A pair of suicide bombers killed at least 26 people Tuesday night at a Shiite mosque in Herat, Afghanistan, a health official said.
Another 33 people were wounded, said Ismail Kawosi, spokesman for Afghanistan’s Ministry of Public Health.
The blasts took place during evening prayers.
The attack started when one suicide bomber began firing on worshippers inside the mosque before blowing himself up, said Abdul Ahad Walizada, spokesman for the police chief.
The second bomber was among the crowd of worshippers when he blew himself up, Walizada said.
Officials fear the death toll could rise since 10 of the wounded are in critical condition, said Dr. Arif Shahram, the director of Herat Regional Hospital.
It was not immediately clear who was responsible for the attack.