Iran's Revolutionary Guards reported a retaliatory attack on Monday following a US airstrike.
The base from which the United States had launched its attack on the southern province of Hormozgan had been struck by Iranian forces, the Islamic Revolutionary Guard Corps said in a statement. The location was not named.
Earlier in the morning, the Gulf state of Kuwait had sounded the alarm over hostile airstrikes. The army provided no information about the origin of the drones and missiles, or the targets of the attacks. The population was urged to follow the instructions of the security authorities.
The US military maintains bases in several Gulf states including Kuwait, just a few hundred kilometres away from Iran.
For days, the US and Iran have been negotiating a framework agreement to extend the ceasefire in place since April 8 and to lay the ground for further talks.
The US military said at the weekend that it had bombed radar and drone control centres in Iran, after Tehran reportedly shot down a US drone. Despite the ceasefire, there has recently been renewed mutual fire.
