The countries have long worried about being sucked into regional war as they juggle relations with Washington, their security guarantor, while seeking to improve ties with Tehran.

President Trump has indicated that the U.S. was given prior warning of the Iranian strike. U.S. and Qatari authorities said the missiles were intercepted.

Iran launched missiles at a US military base in Qatar on Monday, in what it said was retaliation for American strikes against its nuclear sites over the weekend. Witnesses reported hearing loud bangs in the sky above the capital, Doha, while videos showed bright flashes in the sky as air defence systems attempted to intercept missiles.