Iran struck infrastructure in the Gulf on Saturday and threatened a “full-scale offensive” in response to the seventh consecutive night of U.S. strikes against the Islamic Republic.

A month after they agreed a preliminary deal aimed at ending their war, fighting has intensified, with Tehran accusing Washington of hitting an airport, railway station and bridges, The Caspian Post reports, citing France24.

Iran retaliated Saturday with strikes on an oil facility in Kuwait as well as a power and water plant, authorities in the Gulf state said, while in Bahrain the army said air defences repelled a wave of Iranian attacks.

"Iran will no longer limit itself to retaliatory, like-for-like responses... and no political border will be safe," said Major General Mohsen Rezaei, a senior military adviser to Iran's supreme leader, according to state media.

He said Tehran would resume "full-scale offensive operations" if US strikes continue for another two or three days.

Kuwait accused Iran of targeting civilian sites and vital infrastructure after the strike on the power plant forced several power generation units to be deactivated.

It was the second attack on a Kuwaiti power and water plant in as many days, with the first on Friday causing a fire and damage.

Kuwait's state oil firm reported injuries and damage in an attack on an oil facility, and the country's fire service said firefighters were injured battling blazes sparked by Iranian attacks.

In Bahrain, another US ally in the Gulf, the Iranian army said it targeted an air base used by the United States, according to the state broadcaster.

Drones targeted "aircraft shelters and parking areas, fuel storage tanks of the US military at Sheikh Isa Air Base, as well as several connecting bridges", the army said.

Jordan was also hit, with the Iranian state broadcaster reporting fuel tanks at its Al-Azraq base were targeted.

Jordan's army said it had shot down 10 missiles but with no casualties or damage.