At least 16 people have been killed in an attack on a mosque in the Kuwaiti capital, according to paramedics.
Other reports put the death toll at 24.
Islamic State claimed responsibility for the explosion at the Shiite Imam Sadiq Mosque in Kuwait City after Friday prayers.
A posting on a Twitter account known to belong to the Islamic State group claimed the explosion was work of a suicide bomber wearing an explosive belt.
The attack was claimed by an affiliate of the Islamic State group calling itself the Najd Province, the group that claimed a pair of attacks on Shiite mosques in Saudi Arabia in recent weeks.
Paramedic Abdelrahman al-Yusef said most of the victims were men or boys who were at the mosque when the bombing took place.
He said medics have treated at least 179 people.
Basel al-Fadli from the Kuwait Watch Organisation said he had recorded 16 deaths, but several people are still missing.