Suspected Taliban militants attacked a police checkpoint in southern Afghanistan and the ensuing clash left six militants dead and three wounded, an official said Thursday. The clash late Wednesday in Gereshk district of the southern Helmand province also left three policemen wounded, said Ghulam Muhiddin, the spokesman for the provincial governor. The authorities recovered the bodies of the militants and their weapons, Muhiddin was quoted as saying by the Associated Press. In western Afghanistan, a suicide bomber rammed his explosives-laden car into a convoy carrying a regional police chief in western Afghanistan, an official said. No police were injured. The blast, which killed only the bomber, occurred in the western Farah province, said Najibullh Khan, a police official. The province's police chief was traveling to follow up on a kidnapping case in the Bala Buluk district, Khan said.