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.

The US embassy in Qatar has also lifted its shelter-in-place order and said operations will resume as normal on Tuesday.

By Andrew Mills, Parisa Hafezi and Alexander Cornwell DOHA/ISTANBUL/TEL AVIV (Reuters) -Iran's military said it carried out a missile attack on the Al Udeid U.S. airbase in Qatar on Monday after explosions were heard across the Qatari capital following Tehran's threat to retaliate for U.