Police arrested a senior Taliban commander during a clash with militants in southern Afghanistan that left three insurgents dead, an official said Tuesday. The militants, led by Taliban commander Mullah Naqibullah and dressed in police uniforms, ambushed a police convoy on Monday north of Lashkar Gah, the capital of southern Helmand province, said Mohammad Hussein Andiwal, the provincial police chief. The ensuing gun battle left three militants dead, and wounded two policemen and Naqibullah, who was taken into custody, Andiwal said. This is the third time that authorities have arrested Naqibullah. Two months ago, Naqibullah managed to escape from the prison run by the Afghan intelligence service in Lashkar Gah, Andiwal said. Previously he had escaped from a prison in the capital, Kabul.