An AFP correspondent saw black smoke rising from the US embassy in Kuwait, with the diplomatic mission telling people not to come to the premises as Iran pressed on with a third day of Gulf attacks.

The embassy did not announce it had been hit, but issued a security alert urging people to stay away.

“There is a continuing threat of missile and UAV attacks over Kuwait. Do not come to the embassy,” the statement said.

“US Embassy personnel are sheltering in place,” it added.