Mourners attend the funeral procession for senior Iranian military officials and some civilians killed during the U.S.-Israel campaign, in Tehran, Iran, Wednesday. (AP Photo/Vahid Salemi)

DUBAI, United Arab Emirates (AP) — Iran fired on commercial ships Wednesday and targeted Dubai International Airport, escalating a campaign of bottling up the oil-rich Persian Gulf as global energy concerns mounted and American and Israeli airstrikes pounded the Islamic Republic.

Iran’s response to the surprise Israeli and U.S. bombardment that started 12 days ago has upended trade routes, choked supplies of fuel and fertilizer coming out of the Gulf and threatened air traffic through one of the world’s most-traveled regions. Both sides have dug in, hoping to outlast the other.

An Israeli intelligence assessment, meanwhile, found Iran’s new supreme leader, Ayatollah Mojtaba Khamenei, was wounded at the start of the war — on the day when his father and predecessor, Ayatollah Ali Khamenei, was killed in an Israeli airstrike.

An Israeli intelligence official and a reservist with knowledge of the assessment spoke on condition of anonymity because they were not authorized to discuss the matter with the media. They gave no details on the nature of the injuries.

The 56-year-old, whose wife was also killed in the Israeli strike, has not been seen since becoming supreme leader on Monday. Yousef Pezeshkian, the son of Iranian President Masoud Pezeshkian, wrote on social media that he had heard Mojtaba was wounded but that friends said “he is healthy and there is no problem.”

In Tehran late Wednesday, witnesses said they heard loud airstrikes, explosions and heavy fire by anti-aircraft batteries. They could also hear the buzzing of drones overhead. A person driving to Tehran described overcast skies as smoke from bomb and missile blasts mingled in the air that smelled of burnt powder and gasoline. They spoke on condition of anonymity for fear of reprisal.

The fallout across the Middle East widened as Israel struck what it said were targets connected to Iran-backed Hezbollah militants in Lebanon. The U.N. refugee agency said at least 759,000 people have been internally displaced in Lebanon, while more than 92,000 others have crossed into neighboring Syria.

Elsewhere, two Iranian drones hit near the Dubai airport, home to the long-haul carrier Emirates and the world’s busiest for international travel. Four people were wounded but flights continued, the Dubai Media Office said.

The U.N. Security Council voted Wednesday to approve a resolution demanding a halt to Iran’s “egregious attacks” on its Gulf neighbors.

“The international community is resolute in rejecting these Iranian attacks against sovereign countries that are threatening the stability of the peoples, especially in a region of strategic importance to global economy, energy, security, and security of global trade,” said Bahrain’s U.N. ambassador, Jamal Alrowaiei.

The 13-0 vote in the U.N.’s most powerful body reflects Iran’s isolated position as it has aggressively responded to Israeli and U.S. strikes. China and Russia — two Iranian allies — abstained from the vote.

Their ambassadors called the proposal “extremely unbalanced” in not mentioning the strikes against Tehran that began the war. Russia’s U.N. ambassador, Vassily Nebenzia, said it might leave the impression that Iran, “on its own volition and out of malice, conducted an unprovoked attack on Arab states.”

Iran has effectively stopped cargo traffic through the narrow Strait of Hormuz, through which a fifth of all traded oil passes. It has also targeted oil fields and refineries in Gulf Arab nations, aiming at generating enough global economic pain to pressure the United States and Israel to end their strikes.

At least 12 incidents have been confirmed involving vessels in and around the strait since the war began, according to two global trackers. The International Maritime Organization says at least seven mariners have been killed.

A projectile hit a Thai cargo ship off the coast of Oman in the Strait of Hormuz, setting it ablaze. Authorities are searching for three missing crew members from the Mayuree Naree after 20 were rescued by the Omani navy, according to Thailand’s Marine Department.

The United States has pledged to keep the strait open and has led intense airstrikes targeting Iran’s navy and the port city of Bandar Abbas. The U.S. military said Tuesday it destroyed 16 Iranian minelayers near the strait.

Some tankers, believed linked to Iran, continue to get through the strait, making so-called “dark” transits — meaning they aren’t turning on trackers that show where they are. Vessels carrying sanctioned Iranian crude often turn off their trackers.

The commodity-tracking firm Kpler said Iran has restarted crude exports through its Jask oil terminal on the Gulf of Oman. A tanker loaded roughly 2 million barrels at Jask on March 7, it said.