US Central Command (Centcom) said its forces targeted Iranian surveillance sites, military logistics infrastructure, underground weapons storage facilities and maritime capabilities.
According to Centcom, the operation concluded at 9:30pm ET (2:30am BST) after several hours of coordinated strikes involving fighter aircraft, drones, warships and other military assets.
Iran said it retaliated by targeting US allies in the Gulf, including Kuwait, where authorities reported damage to a power plant, a water desalination facility and an oil installation.
Later on Saturday, Kuwait s state news agency said repeated Iranian attacks had caused significant damage to an oil facility and left several people injured.
Jordan s military said it intercepted 10 Iranian missiles that entered its airspace overnight, while Bahrain said its air defence systems successfully thwarted Iranian attacks. No casualties or major damage were reported in either country.
Iranian state media reported explosions in the central city of Yazd, on Qeshm Island and near the strategic port of Bandar Abbas overlooking the Strait of Hormuz.
Verified footage also showed damage near the twin Shahid Mirzaei tunnels north of Bandar Abbas.
Iranian authorities said attacks on electricity infrastructure and desalination pumps near Jask disrupted drinking water supplies to around 10,000 residents across 20 villages.
Officials also reported that more than 100 telecommunications towers had been knocked out, affecting mobile, landline and internet services in northern Hormozgan province.
The renewed hostilities mark one week since fighting resumed after the collapse of the ceasefire reached in June to facilitate negotiations between Washington and Tehran.
Although the ceasefire was largely observed initially, tensions resurfaced after Iran attacked commercial oil tankers, insisting vessels obtain permission before transiting the Strait of Hormuz. The United States responded with military strikes against Iranian targets.
Following the collapse of negotiations, Washington reinstated a naval blockade on Iranian ports, while Tehran declared the Strait of Hormuz closed, bringing much of the shipping traffic through the strategic waterway to a halt.
The Strait of Hormuz normally handles around one-fifth of global oil and liquefied natural gas shipments, prompting renewed concerns over global energy security.
The head of the International Energy Agency, Fatih Birol, warned that the disruption could affect global energy supplies.
Centcom also rejected Iranian media reports claiming two oil tankers had exploded after entering a mined route south of the Strait of Hormuz.
"Like most IRGC claims, this is false," the US military said.
On Friday, Iran claimed it had struck multiple US military facilities across Kuwait, Bahrain, Jordan and Syria, although Washington denied those assertions.
However, sources told CBS News that several US service members had been injured during recent Iranian attacks on two military bases in Jordan.
The United States also denied Iranian allegations that it had deliberately targeted civilian infrastructure.
Verified footage showed extensive damage to Gariveh Bridge in Hormozgan province after overnight strikes, with provincial authorities reporting seven deaths.
A White House spokesperson said US forces had targeted only military objectives, including logistics facilities.
The Pentagon also released footage showing the destruction of a control tower at Iran s Chabahar port, which US Defence Secretary Pete Hegseth said formed part of the Islamic Revolutionary Guard Corps maritime surveillance network.
