A policeman shot dead four soldiers of the NATO-led international coalition in Afghanistan, the military said Sunday. Afghan police said the incident took place in Mizan district of Zabul province, where most foreign troops are Americans and Polish, according to a report of dpa. "What I can confirm is that an individual believed to be an Afghan policeman turned his weapon against the NATO soldiers, killing four in the southern part of Afghanistan," alliance spokesman Charlie Stadplander said. "The status of the attacker is unknown and we are investigating the issue," police officer Ghulam Jilani Farahi said.