Two policemen were killed, while one police officer and two civilians were injured in a blast Saturday in eastern Afghanistan, an official said. "An explosive-packed bicycle detonated in front of a private bank branch in Gardez city, the provincial capital of Paktiya," Rohullah Samoon, spokesman for the provincial governor said. According to dpa, he said it was not clear whom the attack had targeted, but he accused Taliban insurgents for the bombing.