Eleven Turkish police officers have been killed and 45 more people injured when a car bomb exploded outside a police building in the southeast of the country. The attack is being blamed on Kurdistan workers’ party (PKK) militants. The attack caused immense damage to the headquarters of the anti-riot police force in Cizre, with television pictures showing a thick plume of black smoke heading into the sky. Television quoted the health ministry as saying 12 ambulances and two helicopters had been sent to the scene. Early pictures showed that the police building had been completely gutted by the power of the blast, reduced to a shell surrounded by a pile of rubble. Adjacent buildings sustained severe damage and some were still on fire, television pictures showed. Security forces closed the main road to Cizre from the provincial capital of Sirnak to the north after the attack.