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.

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.

DOHA (Reuters) -Qatar's prime minister said on Tuesday relations with Iran have been scarred by an Iranian missile volley at a U.S. airbase in the Gulf Arab state, but that he hoped ties would eventually "come back to normal".