At least twelve persons were killed and three others injured when a trailer hit a passenger pickup near Kohat in Pakistan's North West Frontier Province (NWFP) Saturday, police said. The trailer collided head-on with the pickup, going from Kohat to Lachi, when it suddenly came in front of the long vehicle as it was overtaking another truck. The injured persons were admitted in the district headquarters hospital, Kohat. Both the drivers remained unhurt, who were later arrested by police.