MIRANSHAH (AFP) - A suicide bomber rammed an explosive-filled car into a checkpoint outside Miranshah, the main town of restive North Waziristan tribal district, Tuesday killing three security personnel, officials said. Three security personnel, one from the army, one paramilitary and a tribal policeman, were killed and three others were inured in the suicide bombing at Isha checkpost, a security official told AFP. Another security official and intelligence officials based in the area confirmed the incident. The bomber struck his car into the security post, which exploded after the impact, the official said.