U.S.-led coalition forces killed four police after mistaking them for militants during an operation in southern Afghanistan, a provincial spokesman said Tuesday. The coalition said it could not confirm the incident and was investigating. Coalition troops opened fire at the police in Kandahar province's Maywand district late Monday after spotting the officers firing their weapons into the air and mistaking them for Taliban rebels, Kandahar Gov. Asadullah Khalid said. He said the shooting occurred while the coalition forces were hunting for militants thought to be in the area. A fifth officer was injured in the shooting and five police fled the area but were later found, he was quoted as saying by The Associated Press. --SP 1243 Local Time 0943 GMT