PESHAWAR Four persons were killed when a US drone targeted a vehicle in Tabi Ghudai Kalay area of North Waziristan Agency on Monday. Sources informed that one missile was fired on a suspected vehicle. However it was not confirmed till filing of this report whether or not the killed persons were Taliban fighters. Online adds: A US News Agency, while quoting Wazir Gul, an official of the local government and two Intelligence officials, said that four militants were killed when their vehicle was attacked by a US drone. However, according to two other Intelligence officials, the blast was the result of a mine blast. Meanwhile, according to a private TV channel, a vehicle was targeted in a drone attack and four people were killed. According to local sources, the US drone continued hovering over the area after the attack.