Gunmen on motorcycles opened fire on police in a residential area, killing two It was not immediately clear whether the explosion was caused by a suicide bomber or a bomb planted on a motorcycle DERA ISMAIL KHAN, Pakistan: Police in Pakistan say gunmen opened fire on a police post and then bombed the entrance to a hospital as the wounded were being brought in, killing a total of six policemen and wounding another 10 people. Salim Khan, a senior police officer in Dera Ismail Khan, says gunmen on motorcycles opened fire on police in a residential area, killing two, and then targeted the entrance to the hospital, killing another four. The Pakistani Taliban claimed the attack. It was not immediately clear whether the explosion was caused by a suicide bomber or a bomb planted on a motorcycle.