Afghan police clashed with suspected Taliban militants in southern Afghanistan on Wednesday, killings three fighters and detaining four, a police official said. The militants were killed and captured between the provinces of Kandahar and Uruzgan, where nine border policemen were killed in a militant ambush on Tuesday, said Matiullah Khan, an officer with border police. Afghan and NATO-led forces also battled suspected militants for nearly five hours in Uruzgan province on Tuesday, leaving 12 Taliban and nine policemen dead, UruzganÂ’s police chief, Gen Mohammad Qasem, said. Four militants and 10 Afghan troops also were wounded, he said.