KANDAHAR, Aug 06, SPA -- Afghan and foreign troopsthwarted a Taliban ambush at a checkpoint in southernAfghanistan and killed 13 suspected militants, a localofficial said Monday. Troops battled the militants for over two hours on Sunday in Zabul's Shahjoy district after they tried to attack the checkpoint on the main road linking Kabul to the southern city of Kandahar, said Ali Kheil, the spokesman for Zabul's governor, according to a report of the Associated Press.--SPA www.spa.gov.sa/473035