Iran's Revolutionary Guards targeted a US air base in Bahrain, according to a statement from the elite force carried by IRNA on Tuesday.

"The IRGC announced that...its naval forces carried out a large-scale drone and missile attack at dawn on the US air base in the Sheikh Isa area of Bahrain," IRNA posted on Telegram, using the acronym for Iran's Islamic Revolutionary Guard Corps, The Caspian Post reports, citing foreign media.

The force said in its statement that 20 drones and three missiles were launched, "destroying the base's main command headquarters", without providing evidence.

Tehran's latest claimed attack came after its military launched salvos across the Gulf region in retaliation for US and Israeli strikes on Iran that began on Saturday.

Four witnesses told AFP early Tuesday that explosions were also heard and clouds of smoke seen in the Saudi Arabian capital Riyadh's diplomatic quarter, home to foreign embassies and diplomats' residences.