The ‌U.S. government on Wednesday said it was imposing sanctions against 11 people ​and entities, including several based ​in China and Hong Kong, ⁠for supporting weapons procurement by ​Iran’s Islamic Revolutionary Guard Corps and ​the Iranian military, Reuters reported.

Nine of those designated were China- and Hong Kong-based individuals ​and companies that facilitated the ​procurement of weapons for Iran’s military, and ‌a ⁠Hong Kong-based company operating within Iran’s clandestine banking network, the U.S. Treasury’s Office of Foreign Assets ​Control said ​in ⁠a statement.

The U.S. State Department also designated two ​companies and individuals based in ​Iran ⁠and Belarus in connection with Iran’s conventional arms-related activities, Treasury ⁠said.

All personnel on board ​a military helicopter have been ‌killed in a crash near Muzaffarabad in Pakistani Kashmir, Pakistan’s ​military said in a ​statement on Wednesday, without specifying ⁠the number of deaths.

“An ​Mi-17 helicopter of Pakistan Army ​Aviation crashed near Muzaffarabad today during take-off due to technical fault,” ​the military said in ​a statement, Reuters reported. “There were no survivors.”

Rescue teams have ‌reached ⁠the site and a board of inquiry has been ordered to ascertain the ​exact technical ​cause ⁠of the accident, it said.

The helicopter crashed ​while taking off and ​caught ⁠fire, a Reuters witness said, adding that firefighters were ⁠trying ​to control the ​flames.

Iran’s Revolutionary Guards said they had carried out attacks against a U.S. base in Jordan and 21 other targets in the Gulf on Wednesday in retaliation for American strikes around ​the Strait of Hormuz, Iranian media reported.

The clashes mark one of the biggest exchanges in hostilities since the two countries agreed to a ceasefire in April, Reuters reported.

The Iranian strikes, which included attacks in ‌Kuwait and Bahrain, came after the U.S. military said on X it had targeted Iranian air defence, ground control stations and surveillance radar sites near the strait in response to what U.S. President Donald Trump said was the downing of a U.S. Apache helicopter on Tuesday.

“I believe the response should be very strong, very powerful, and that’s what this one is,” Trump told ABC News on Tuesday.

The escalation in violence deepens doubts about the prospects for a deal to end the war that started on February 28 with joint U.S.-Israeli strikes against Iran. Tehran ​responded by firing on Gulf neighbours that host U.S. bases and all but choked off the Strait of Hormuz, a vital conduit for oil and gas.

The latest U.S. strikes lasted around four hours before the ​U.S. Central Command posted just before 9 p.m. ET (0100 GMT Wednesday) that they had ended. A U.S. official said almost 20 Iranian targets had been struck.

Iran’s state media reported that ⁠Qeshm island and the port city of Sirik in the Strait of Hormuz were attacked.

Sounds of explosions were heard in nearby Bandar Abbas, and later in the vicinity of Jask, near the entrance to the strait, Iranian media reported, citing local ​sources and residents.

Iran’s Revolutionary Guards said in response they had targeted four sites at the U.S. al-Azraq base in Jordan using long-range missiles, Iranian media reported.

The Guards said the targets included F-35 fighter jet hangars and a command-and-control centre, and ​warned they were ready to deliver a “crushing and decisive” response to any further U.S. attack.

Jordanian armed forces said on Wednesday they had intercepted and shot down five missiles launched from Iran toward al-Azraq. The military added that debris from the interception operation fell on Jordanian territory but caused no injuries or material damage.

The Kuwaiti army said its air defence systems were engaging hostile aerial targets and urged the public to follow official safety instructions, after Iran’s Revolutionary Guards said they had targeted the Ali Al Salem base in Kuwait with drones.

Iran’s Revolutionary ​Guards said earlier they attacked the U.S. Fifth Fleet in Bahrain with drones and threatened “more severe responses” if hostilities continued, according to media.

Bahrain’s Interior Ministry said a warning siren had been sounded and urged the public to head to safety. ​Air defences had repelled Iranian attacks, a media adviser to Bahrain’s king said soon after in a post on X.

A U.S. official, speaking on condition of anonymity, said initial assessments showed nearly all missiles and drones launched by Iran were intercepted and they ‌were not immediately ⁠aware of any reports of harm to U.S. personnel or damage to U.S. locations.

The Pentagon did not immediately respond to a request for comment. Reuters could not immediately verify the battlefield reports.

Oil prices climbed about 1% in early Asian trade on Wednesday following the escalation in hostilities.

NOT A BIG DEAL?

On Tuesday, a U.S. Apache helicopter was brought down by a one-way Iranian attack drone, according to a U.S. official who spoke on condition of anonymity. Two U.S. pilots involved in the helicopter incident were uninjured, Trump said.

Iran’s state media cited a military source as saying that no offensive air military operations had been conducted in the Strait of Hormuz in the previous 24 hours.

A U.S. Navy surface drone found and rescued the two ​crew, the U.S. military said, after the U.S. Army attack ​helicopter went down in waters near Oman’s coast while ⁠on patrol at around 3 a.m. on Tuesday (2300 GMT on Monday).

The U.S. military’s Central Command gave no reason for the crash. It said the two crew were rescued after two hours and said they were in stable condition – a more cautious assessment than Trump’s description.

Iran’s Foreign Minister Abbas Araqchi did not directly address the helicopter incident, but said in a ​post on X that foreign forces in the region risked being involved in accidents or crossfire.

“To reduce risk, best solution is for them to leave,” he wrote.

Trump told ​The Wall Street Journal during a ⁠phone call on Tuesday that the helicopter incident “wasn’t a big deal” and stressed that “the pilot is fine.”

However, the episode could well add further strain to efforts to broker a peace deal to end the wider Middle East war and reopen Hormuz.

Trump has repeatedly said Iran and the United States are close to an agreement, though there have been few signs of progress since a tenuous ceasefire took effect in early April.

Fighting between Israel and Iran-backed Hezbollah militants in Lebanon has continued, and Tehran has maintained its ⁠restrictions on most ​shipping through the Strait of Hormuz, which before the war carried a fifth of the world’s crude oil and liquefied natural gas. Washington has ​imposed its own blockade of Iranian ports.

U.S. Energy Secretary Chris Wright said on Tuesday that ship traffic through Hormuz is rising “very meaningfully,” but added it would take many months to get back to normal flows of energy once the war is over.

Trump has said any peace deal must ensure ​Iran cannot develop a nuclear weapon. Iran denies any such ambitions.

Iran’s demands include the lifting of international sanctions, the release of billions of dollars in frozen assets and recognition of its control of the strait.