Six security men were killed in attacks over check posts in Bajaur tribal region and Zhob area of Balochistan. At least four security men were killed in militants attack at a check post in Khar, the chief town of Bajaur tribal region. The militants raided a Levies Force check post in Khar on Friday morning killing four security men, sources said. Meanwhile, in Warsala area of Zhob in Balochistan, militants attacked a security post this morning killing a security person on the spot injuring another, which was later died of injuries in hospital. The attackers fled from the scene after retaliatory firing by the security men. Around two dozen gunmen attacked a checkpoint, killing four policemen, in Pakistan's increasingly violent tribal belt where air strikes killed more than 10 militants, officials said Friday. About 20 to 25 armed rebels targeted the post manned by local tribal police overnight near Khar, the main town in the semi-autonomous region of Bajaur, where Islamist militants have a significant presence, officials said. The armed militants attacked the post killing all (four) policemen inside," local government official Adialat Khansaid. He said the post, set up to conduct security checks on the main road heading into Khar, was destroyed. Other security officials confirmed the incident, which came after another government official said gunmen abducted a policeman in Mamoun, 15 kilometres (nine miles) northeast of Khar. In the tribal district of Orakzai, south of Pakistan's main northwestern city Peshawar, more than 10 militants were killed in air raids late Thursday, military and government officials said. "Militant compounds and hideouts were targeted in the attacks. More than 10 militants were killed in the bombing," a military official said. It was the second bout of Pakistani air strikes in Orakzai following the deaths of at least 26 security personnel in a helicopter crash in the area.