US has completed its latest round of attacks on Iran, the sixth night in a row, as fighting over Strait of Hormuz intensifies.

Qatar says it has intercepted a missile attack, after AFP journalists in the capital Doha reported hearing several blasts.

"The Ministry of Defense of State of Qatar announces that armed forces intercepted missile attack which targeted State of Qatar," the defence ministry wrote on X.

AFP journalists in Doha have reported hearing several blasts early on Friday, as Iran struck US allies in the renewed Middle East war.

A public safety alert warned the security threat level was "elevated" and urged residents to take shelter.

Kuwait has said it was responding to missile and drone attacks, a day after the Gulf nation faced aerial strikes from Iran.

"Kuwaiti air defenses are currently engaging hostile missiles and drone attacks following the nefarious Iranian aggression," the army wrote on X.

In Bahrain, the interior ministry said that a siren had been sounded, urging citizens to take shelter.

Iranian state media said that Tehran was targeting US helicopters and planes at an air base in Bahrain "in response to the enemy's hostile action in targeting urban infrastructure and innocent people".

US Vice President JD Vance defends Pakistan-mediated deal to end US-Israeli war on Iran, saying, "I know beyond a shadow of a doubt" that some Israeli officials are "manipulating and trying to change American public opinion."

Deadly US attacks have hit an airport, a railway station in the port city of Bandar Abbas and two bridges in southern Iran near the Strait of Hormuz, Iranian state media said early on Friday.

"Three explosions were heard around the airport and at least one American enemy projectile hit Iranshahr airport," in the southeast, state television IRIB said on Telegram.

"A few minutes ago, the Bandar Abbas Railway Junction Station was targeted by the American enemy. According to this report, two Iranians were injured in the attack," Mehr said on Telegram.

An official report spoke of US attacks on two bridges Hormozgan Province and cited IRNA as saying that two people were killed and four were wounded.

Iran has launched a wave of strikes on US targets across the Gulf, saying it will not compromise on Strait of Hormuz, journalist Reza Hatami is reporting.

Tehran’s response comes after US attacks on Bandar Abbas, Qeshm Island and a bridge in Bandar e Khamir.

Hatami says that Iran has surveillance and monitoring equipment in these areas that allows it to oversee the Strait of Hormuz. Iran also has air defence systems, missile and drone sites in these areas, he adds.

Republicans on the House Budget Committee have advanced a $95 billion package for the US war on Iran, farm aid and President Donald Trump's push for strict new voter ID requirements, moving forward on a party-line vote despite trouble in the full House — and the Senate.

Budget Committee Chairman Jodey Arrington framed the proposal as one last push to deliver for voters ahead of the midterm elections that will determine control of Congress. It advanced on a vote of 20-14.

"We are rallying to finish what we started when the American people sent us here,” said Arrington, R-Texas.

With Iran war funding makes up the bulk of the package, some $60 billion, Arrington acknowledged that people can debate "why we're there” in the overseas conflict. But he said the money is needed for basic supplies — "just the bombs, bullets and battlefield readiness for our men and women in uniform to finish the fight successfully and return home safely — that’s it."

Iranian state media have reported explosions and US attacks in locations across the south on Thursday night, as hostilities between the two foes rekindled.

State TV reported two explosions in the city of Bushehr — home to Iran's only civilian nuclear plant — in a "continuation of the American enemy aggression", as well as a series of unattributed explosions in coastal Bandar Abbas.

The official news agency IRNA also reported "American enemy attacks on areas around Ahvaz", where fearful residents told AFP they had heard intense strikes for a second night in a row.

The Kuwaiti army has said that 32 drones were fired by Iran toward vital installations in the country on Thursday amid rising escalation between Tehran and Washington.

"These drones were intercepted and engaged," Defence Ministry spokesman Saud Al-Atwan said in a statement.

He said debris from the interception of the Iranian drones caused material damage, but without casualties.