Three suicide bombers attacked Pakistani police and paramilitary soldiers in the southwestern city of Quetta on Tuesday, killing six police and wounding 15, according to officials. One bomber detonated his explosives near a police truck. “It is a suicide attack,” provincial police chief Moazzam Jah Ansari told Reuters. Two suicide bombers tried to attack a paramilitary checkpoint on the city’s outskirts half an hour earlier. The troops had opened fire at the attackers, who detonated their explosives, wounding eight soldiers, a paramilitary officer said. No group immediately claimed responsibility for the attacks.