The US military said it had carried out a seventh consecutive night of strikes against Iran since President Donald Trump declared their interim deal “expired”.
The US Central Command (Centcom) said its forces “struck patrols, military infrastructure, an underground weapons depot, and naval forces”.
Iran said it responded by targeting US allies in the region, including Kuwait, which said a power plant, water outlet and oil facility were hit.
It marked a week full of renewed tensions that also saw the US reimpose the blockade of Iranian ports and traffic stoppages in the Strait of Hormuz as an initial ceasefire agreement faltered less than a month after it was signed.
Later on Saturday, Kuwaiti state media said an oil field had been severely damaged and some people were injured in “repeated attacks by Iran”.
The Jordanian military also said it intercepted 10 Iranian missiles that were fired at its territory during the night. No damage was reported. Bahrain also said its air defenses had “prevented” the Iranian attack.
Centcom said it had ended its strikes at 21:30 ET (02:30 BST) after several hours.
“The US military has used fighter jets, aircraft drones, and warships in addition to other assets,” its statement said.
Explosions were heard in the center of the city of Yazd and on the island of Qeshm and in the port of Bandar Abbas near the river, Iranian state media reported.
BBC Persian has confirmed two videos showing the damage and debris in the twin tunnels of Shahid Mirzaei, the route running north of Bandar Abbas.
Local authorities also said attacks on power plants and desalination pumps at an industrial plant near Jask left about 10,000 people in 20 villages without drinking water.
Meanwhile, more than 100 communication towers have been out of service, disrupting landlines, mobile phones and the internet in the north of Hormozgan province.
The US and Iran agreed to a ceasefire in June for talks to end the war.
A cease-fire is under heavy scrutiny, or an attack by Iran on oil tankers to force it to comply with Tehran’s demands that the vessels seek permission to cross the Strait of Hormuz. The Iranian naval attack was followed by US strikes against Iran.
However, the talks appear to have failed and Trump announced a ceasefire last week.
Since then, in addition to attacking Iranian sites, the US has also imposed an embargo on Iranian shipping.
Iran has announced that the Strait is closed to traffic and the movement of people has come to a standstill.
A fifth of the oil and natural gas used in the world passes through the port and the head of the International Energy Agency, Fatih Birol, said he has concerns about the global energy supply.
The US military also denied a report by Iran’s Fars news agency that two oil tankers “exploded and caught fire while passing through a minefield in the southern Strait of Hormuz”. Centcom said: “Like many IRGC claims, this is false.”
