Islamabad- The Tehreek-e-Taliban Pakistan (TTP) has claimed responsibility for the suicide blast that hit police bus in Karachi today morning, killing 13 policemen. The blast injured at least 38 cops and civilian pedestrians, damaged several vehicles on the road near police training centre in Razaqabad area of Karachi. TTP Spokesperson Shahidullah Shahid said that this attack was in reaction to killing of their members in an encounter with security forces in Swabi and Peshawar. The TTP threatened that such attacks would continue until the security forces stop encountering their members and activists. There were more than 50 police officers in the police bus at the time of incident. The vehicle was completely destroyed in the explosion.