Bahrain sounded its missile alert sirens for a second time Monday as Iran retaliated over US airstrikes targeting it.
The warning urged the public to seek shelter in the island kingdom, home to the US Navy's 5th Fleet.
There was no immediate word on any damage or casualties in the attacks
Monday morning. Earlier, missile alert sirens had sounded at dawn on Monday.
The US military earlier said it wrapped up its latest round of attacks targeting Iran after hitting dozen of targets.
Iran's paramilitary Revolutionary Guard said it was in the process of launching attacks in response.