At least four people have been killed in a suicide bomb attack on a Shia mosque in the Kuwaiti capital, the BBC reports.
Many people were injured, and unconfirmed reports put the death toll much higher.
The blast hit during Friday prayers at the Imam Sadiq Mosque in al-Sawaber, a busy area to the east of Kuwait City.
An Islamic State- (IS) affiliated group said it was behind the attack. IS has carried out similar recent attacks in neighbouring Saudi Arabia and Yemen.