Iran War Update Day 37, April 5 | Persian Gulf Escalation Deepens as Hormuz Deadline Raises New Risks

Inside Iran

Inside Iran, the most important development was the U.S. rescue of the second airman from the downed F-15 mission in Isfahan province. Reuters reports that the rescue operation succeeded after the first crew member had already been recovered. Iran then said its forces had destroyed several U.S. and Israeli aircraft during that mission, including transport planes, helicopters, and drones, but Reuters noted those Iranian claims were not independently verified and these devices have been destroyed by the Americans themselves.. An Israeli security official also said Israeli intelligence helped the U.S. rescue effort and that Israel paused military activity in the area to facilitate it.

Outside Iran

Outside Iran, the clearest escalation was in the Persian Gulf. Iran’s Revolutionary Guards said they targeted petrochemical facilities in the UAE, Kuwait, and Bahrain and warned they would intensify attacks on U.S. economic interests if attacks on civilian targets in Iran continued. Reuters separately reported that Bahrain’s Gulf Petrochemical Industries Company said a fire caused by an Iranian drone attack was brought under control, with no injuries reported, while Kuwait Petroleum Corporation said a drone attack caused severe material damage and fires at several operational units, also with no injuries reported. The Bahraini and Kuwaiti damage was independently reported; the reported UAE strike was still primarily at the level of the Iranian claim.

There was also a maritime attack tied to the same escalation. Iran said it struck an Israel-linked vessel in the Strait of Hormuz, reportedly setting it on fire with a drone attack. Israel had no immediate response in the Reuters report I reviewed. That matters because it shows the fighting is still moving across three layers at once: inside Iran, against regional energy infrastructure, and against shipping tied to U.S. or Israeli interests.

Strait of Hormuz

On the Hormuz front, the picture remains mixed but dangerous. Trump publicly warned that if Iran does not reopen the Strait of Hormuz by Tuesday evening, the U.S. would target Iranian power plants and bridges. At the same time, Reuters reported that Iran has been allowing some limited movement: it permitted vessels carrying essential goods to its ports and has also allowed certain ships unconnected to the U.S. or Israel to pass, including a Malaysia-linked tanker carrying Iraqi crude. That means the strait is not fully normalized; it remains a coercive choke point under Iranian control rather than a safely reopened corridor.

International reactions

International reactions intensified as the war’s economic spillovers widened. Egypt said its foreign minister held de-escalation calls with U.S. envoy Steve Witkoff and Iranian Foreign Minister Abbas Araqchi. China said it was ready to work with Russia to ease tensions and argued that a ceasefire is the key to resolving shipping risks. Russia said the U.S. should abandon the “language of ultimatums.” South Korea, worried about energy and shipping exposure, asked Persian Gulf states to help maintain stable supplies and protect Korean vessels. Meanwhile, the U.N. track remains active, with a Bahraini-backed Security Council push on commercial shipping protection still under debate.

What is going on strategically?

What is going on strategically? Day 37 shows a war that is becoming more regional and more economically coercive. Iran is signaling that if pressure continues inside its territory, it can raise the cost by hitting energy infrastructure and maritime traffic in the Persian Gulf. The U.S. response is moving toward an explicit threat against Iranian civilian infrastructure with economic value, not just military targets. That raises the probability that the next 24–48 hours could bring either a limited diplomatic opening or a sharp jump into infrastructure-for-infrastructure escalation.

Attacks Reported by Vahid Online and Ilia Hashemi in the Past 24 Hours

In the past 24 hours, the two Telegram channels Vahid Online and Ilia Hashemi together described a broad pattern of attacks, explosions, air activity, and military operations across multiple parts of Iran. Much of the information came from citizen reports and local observations, so several items remain unverified, but taken together they point to a very active night and day across several provinces. The main areas mentioned were Mahshahr, Kohgiluyeh and Boyer-Ahmad, Karaj, Tehran, Borujerd, Isfahan, Bushehr, Ahvaz, Arak, Bandar Abbas, and Shiraz.

Mahshahr, Khuzestan:

• One of the earliest major attacks mentioned in the combined reporting was in Mahshahr, where Ilia Hashemi said that Fajr 1, Fajr 2, Rajal, and Amir Kabir petrochemical facilities were struck by missiles. A follow-up message said that electricity to facilities, refineries, and factories in the Mahshahr industrial zone was cut afterward. This suggests that the strike was aimed not only at industrial infrastructure but also at disrupting wider energy and production capacity in the area.

Kohgiluyeh and Boyer-Ahmad / Kuh Siah area:

• A major part of Ilia Hashemi’s reporting focused on a U.S. military search-and-rescue operation for a missing pilot in western Iran. He reported that at around 20:40 on Saturday night, U.S. military activity was underway in the skies over western Kohgiluyeh and Boyer-Ahmad. Later, in the early hours of Sunday, he said U.S. warplanes attacked and bombed the position of an unidentified group, described as possibly IRGC-linked or local forces, that was trying to reach the suspected location of the pilot near the southern side of Kuh Siah. He also reported helicopter movement, sustained gunfire from the air to the ground at around 02:30, and later claims that a large number of military and local casualties were taken to Dehdasht hospital around 02:49. Vahid Online also cited reporting that U.S. forces bombed an area during the pilot rescue operation in order to keep Iranian forces away from the pilot’s location.

Karaj:

• Karaj appeared in both channels’ broader reporting. Ilia Hashemi said that around 21:25 on Saturday night, five explosions were heard around Karaj. In parallel, reporting carried by Vahid Online pointed to a connection between Malard in Karaj and rocket-launch activity, with one message saying a launch occurred around 14:00 and that the launch area was bombed shortly afterward. Residents also reported explosions in the Mehrshahr area. Together, these reports suggest Karaj and its surrounding western approaches remained an active military zone, possibly linked to launch sites and retaliatory targeting.

Borujerd, Lorestan:

• Vahid Online reported attacks in Borujerd around 12:41 to 12:55. Multiple local messages said explosions were heard near the Road and Transportation Department, around Imam Khomeini Square, and near the Iran Khodro area. Some messages specifically stated that the Transportation Directorate was hit, and one report linked the area to a previous missile launch. The consistency in local messages suggests that a transportation or logistics-related site in Borujerd was a target.

Western Tehran and Karaj corridor, mid-afternoon:

• Vahid Online also reported that around 14:13 to 14:15, residents in western parts of Tehran including Marzdaran, Ponak, and Chitgar heard explosions. At the same time, some reports mentioned rocket launch activity from Malard, Karaj, followed by what was described as a strike on the launch point. This indicates a possible sequence of launch-and-counterstrike activity in the Tehran-Karaj western corridor.

Isfahan:

• One of the clearest clusters of reports was from southern Isfahan. Vahid Online described repeated explosions beginning around 13:03 to 13:04, with reports of loud blasts, aircraft or drone sounds, and further explosions around 14:10, 14:17, and later into the afternoon. Messages referred to Baharestan, Sepahan Shahr, and southern parts of the city, and one update identified the likely target as the 14th Imam Hossein Division. Other messages referred to more than six explosions near Baharestan and the provincial command area, with smoke and fire visible for several minutes. This was one of the strongest indications in the reporting of a direct strike on a known military formation or related command site.

East and northeast Tehran, evening attacks:

• Later in the day, Vahid Online carried a large number of citizen messages from east and northeast Tehran, especially from areas such as Sabalan Jonoubi, Narmak, Tehranpars, Majidieh, Niavaran, Heravi, Ozgol, Qeytarieh, and Pasdaran/Pessian area. The first wave was reported around 20:37 to 20:38, when residents said air defenses became active and multiple explosions were heard. Additional reports came in around 20:45, 20:52, and 20:53, describing repeated blasts, anti-aircraft fire, and possible drone sounds. The reporting does not identify a single confirmed fixed target, but the scale and spread of the observations suggest either incoming attacks on military positions in the eastern/northern arc of Tehran or intensive air-defense engagement against aerial threats.

Bushehr:

• Bushehr was another major focus in the evening. Vahid Online reported strong explosions beginning around 20:35, with residents describing 4 to 5 major blasts strong enough to shake windows and curtains. Further explosions were reported around 20:36, 20:42, 20:51, and 21:01. Some messages suggested the blasts were linked to the Sadra marine industries complex, while others pointed to the Khormoj missile base, saying it had been hit five times around 19:00 and was being targeted repeatedly on a near-daily basis. Another report mentioned blasts near Bual-Kheir and in the Khormoj mountains. Altogether, the Bushehr reporting suggests strikes on a mix of industrial-marine and missile-related military locations.

Ahvaz:

• Ahvaz saw some of the heaviest reported bombing in the report. Vahid Online’s messages said that around 20:45 to 20:48, residents in Amaniyeh, Kianpars, Kianshahr, and Golestan heard multiple powerful explosions and unusually loud warplane activity. Several messages said buildings shook, and one report described more than 10 to 12 severe explosions. Specific locations mentioned included the 92nd Armoured Division, the Ahvaz air-defense area, and Sepah-e Vali Asr near the old Ahvaz-Andimeshk road. A later message at 21:03 said additional explosions were heard from farther away. The Ahvaz reports strongly suggest that military and security sites were primary targets there.

Arak:

• Vahid Online also carried brief reports from Arak, where residents said several fighter jets passed overhead around 21:04 to 21:06, followed by distant explosions. The exact target was not identified, but locals believed that something near the city had been struck.

Bandar Abbas:

• In Bandar Abbas, messages reported an unusually loud sound around 21:05 to 21:18, described by one witness as if a missile had launched from nearby, followed by multiple heavy explosions. Areas near Bahonar were specifically mentioned. One report said six explosions were heard after the initial launch-like sound. While the exact target remains unclear, the concentration of reports around the port zone suggests activity linked to coastal, naval, or logistics facilities.

Shiraz:

• Vahid Online reported that Shiraz also experienced heavy explosions later in the evening, around 21:50 to 21:51. Witnesses mentioned very loud blasts near the second gate of a base, Ghodousi Gharbi, and an industrial-looking area. Some reports speculated that the target may have been either the Imam Hossein garrison or an armoured garrison. The source remained unverified, but the repeated local references suggest that at least one military or military-adjacent site in Shiraz was struck.

Central Tehran / Sohrevardi Shomali:

• Ilia Hashemi separately posted an image and short note referring to a building in Sohrevardi Shomali, below Ibn Yamin, in Tehran. He did not provide a detailed attack timeline for that location, but the post indicated that a specific building there had been hit.

General military movement and threat context:

• Ilia Hashemi also reported sightings of warplanes moving across Iranian skies, including aircraft seen at 12:32 on Saturday moving toward Tehran before reportedly turning south, and another sighting around 01:19 early Sunday over Isfahan, again later said to have turned south toward the Kuh Siah area. In parallel, both channels also referenced statements by Donald Trump threatening strikes on Iranian bridges and power plants if Tehran failed to comply with U.S. demands related to the Persian Gulf and the Strait of Hormuz. These statements do not describe attacks themselves, but they help explain the broader escalation backdrop in which these strikes and military movements were being reported.

Overall conclusion:

Day 37 was defined by three developments: the U.S. rescue mission inside Iran, Iran’s expanded strikes on Persian Gulf energy targets, and Trump’s hard deadline over the Strait of Hormuz. No new confirmed targeted assassination stood out in this window, but the war clearly widened and the risk of another major escalation is now very high. 

Taken together, the two channels described a highly active 24-hour period marked by attacks or reported explosions across a wide geographic arc of Iran. The main patterns in the combined reporting point to strikes on petrochemical infrastructure, missile and military bases, transportation or launch-related sites, and urban military/security positions. The heaviest concentration of evening reports came from Tehran, Bushehr, Ahvaz, Bandar Abbas, Shiraz, and Arak, while the most strategically notable daytime reports involved Mahshahr, Isfahan, Borujerd, Karaj, and the U.S. rescue-related operation near Kuh Siah.

Q&A:

What defined Day 37 of the Iran war?

Day 37 was defined by a broader regional escalation. The conflict moved further into the Persian Gulf, with pressure on energy infrastructure and maritime routes adding a new layer of economic and geopolitical risk.

What happened in the past 24 hours?

The key developments were the reported expansion of Iranian-linked attacks toward Persian Gulf energy targets, continued tension around the Strait of Hormuz, and sharper warnings from Washington about the consequences if maritime traffic is not fully restored.

Were there any confirmed targeted assassinations?

No newly confirmed targeted assassination stood out in this specific 24-hour window. The main focus of the latest developments was on infrastructure, shipping, military operations, and diplomatic reactions.

Why is the Strait of Hormuz so important now?

The Strait of Hormuz remains one of the world’s most important energy chokepoints. Any disruption there raises the risk of tighter oil supply, higher shipping costs, and broader market volatility across energy, currencies, and risk assets.

Why does the Persian Gulf front matter so much?

Because it shows the war is no longer confined to direct military exchanges. Once attacks, threats, or disruptions spread into the Persian Gulf, the conflict begins to affect regional energy security, trade routes, and the global macro outlook more directly.

What are markets and governments watching next?

They are watching whether the situation moves toward limited de-escalation or shifts into a more dangerous infrastructure-for-infrastructure phase, especially around shipping, energy sites, and cross-border retaliation.