Coalition soldiers accidentally fired on an unmarked police car in eastern Afghanistan, killing three Afghan police and wounding three others, the military said on Wednesday.
The shooting happened on Tuesday at a checkpoint in eastern Kunar province, said US Col Tom Collins during a press briefing in the capital, Kabul.
The incident began when the car approached the checkpoint without slowing down, Collins said.
Coalition soldiers saw that the occupants, who were not in uniform, were armed and "felt they were in immediate danger so they opened fire on the vehicle," he said.
Collins said the coalition "regrets the incident."