At least 13 people, including four security personnel, were killed and more than 20 were injured on Sunday when a suicide bomber blew himself up near an army base in north-west Pakistan, officials said, according to dpa. The explosion occurred inside a military-run bakery near the Punjab Regimental Centre in Mardan district of North-West Frontier Province (NWFP). "The place was littered with blood and flesh," a witness, Amir Khan, said. "Around 30 bodies were lying there. I do not know how many of them were dead." The killed and injured were moved to two hospitals in the city. Bakht Khan, a health official, at the District Hospital confirmed that six bodies were moved there. Seven were brought to the Combined Military Hospital. Six of the 22 injured were said to be in critical condition. Following the blast, the military cordoned off the area and several ambulances were lined up outside the bakery. A security official who spoke on condition of anonymity said: "The militants might have targeted the bakery because every Sunday evening it is usually packed with army men." Military spokesman Major General Athar Abbas said at least four security personnel were among the dead. He confirmed the blast was a suicide attack.