Security officials in the area said on Friday that the blast at a mosque in an army base had killed at least 26 people and wounded 50.

The victims had gathered for Friday prayers at the mosque in the Ismail Khel district of Khost province.

All those killed in the suicide attack were working for the Afghan security forces, said Captain Abdullah, a military spokesman in Khost, who goes by only one name.

Friday’s attack came three days after a suicide bomber detonated his explosives at a gathering of religious scholars in Kabul, the capital.