Reuters - U.S.-allied Bahrain warned its citizens on Saturday against travel to Iraq and Iran and asked those already there to return �immediately� for their safety, state news agency BNA said.

The Bahrain foreign ministry cited, �unstable regional circumstances, dangerous developments and potential threats,� according to BNA.

The warning comes amid simmering tensions between the United States and Iran.

Washington on Wednesday pulled non-emergency staff members from its embassy in the Iraqi capital Baghdad out of apparent concern about perceived threats from neighbouring Iran, to which Iraqi Shi�ite militias are allied. Earlier on Saturday Exxon evacuated its foreign staff from an Iraqi oilfield. nL5N22U084 (Reporting By Maha El Dahan)