In Pakistan, at least 21 people, including women and children have been killed when a suicide bomber struck at a police residential colony at Kohat in northwest part of the state on Tuesday. 40 people have also been injured in that incident. The attacker detonated an explosive-laden vehicle shortly after 'iftar', the evening meal to break the fast during the Islamic holy month of Ramzan.A majority of the 25 flats in the colony collapsed due to the powerful blast, which was heard from several kilometers away. Police officials said that 21 bodies have been pulled out of the rubble of collapsed buildings, including six children and eight women.