A huge explosion has ripped through a crowded mosque in the Afghan capital Kabul, killing 21 people, police say.
Another 33 people were injured, Kabul police spokesman Khalid Zadran said.
Wednesday’s blast occurred during evening prayers. The mosque’s imam is reported to be among the dead.
It is unclear who was behind the attack, a week after a prominent so-called Islamic State (IS) militants killed a pro-Taliban cleric in a suicide bomb blast, also in Kabul.
IS has emerged as the most potent enemy of the Taliban, who seized control over Afghanistan last year. The two groups are now engaged in a murky and bloody battle.
Security forces have now sealed off the blast scene in Kabul.
Witnesses described hearing a powerful explosion which shattered windows in nearby buildings.
Stefano Sozza, the head of the Emergency NGO running the city’s main hospital, told the BBC his group had treated 35 people, including children.
Intelligence teams said their investigation was ongoing.