KHAR : A man was killed and two others injured in a bomb blast outside a mosque here on Friday. Security sources said the blast took place in tehsil Mohmand of Bajaur Agency where unknown miscreants had planted explosive material outside a mosque which exploded when the people were coming out after offering Asr prayers. A man died instantly in the blast while two others sustained critical injuries who were shifted to agency headquarters hospital for treatment. The security forces cordoned off the area after the blast and started search action.