A suicide bomber targeted a mosque in a troubled tribal area of Northwest Pakistan on Friday killing at least 22 people and wounding more than 20, local officials said.


"The bomber detonated himself near the gate of a mosque in Tirah valley of Khyber tribal region when people were returning from the prayers," local administration official Jamilur Rehman told AFP, adding that the casualty numbers may rise.

The mosque is located in an area controlled by warlord Mangal Bagh, he said explaining that "most of the dead belonged to Lashkar-i-Islam group lead by Mangal Bagh."

The bomb, which also damaged the mosque, exploded in the same area where officials said a clash earlier in the day had left 10 soldiers and 23 militants dead.