MANAMA: Blasts and sirens rang out over Bahrain and authorities urged residents to seek shelter on Sunday as Iran's Guards said they had attacked a US military base in the Gulf nation.

Alarm sirens blared, according to an AFP journalist, while authorities posted several alerts on social media, without specifying the source of the threat.

The interior ministry in an X post urged "residents to remain calm, proceed to the nearest safe location, and follow news through official channels for the protection of public safety."

Explosions could be heard around 4am (0100 GMT), the AFP journalist said, with residents reporting a second series of blasts around 6.30am (0330 GMT).