Authorities say a police officer fatally shot a naked man on Monday afternoon outside a suburban Atlanta apartment complex who doesn't appear to have been armed.

Chief of Police Cedric Alexander in greater Atlanta's DeKalb County says the officer responded to reports of a suspicious person knocking on doors and crawling on the ground naked.

The chief says the officer saw a naked man in the complex parking lot and that the man began running toward the officer. Alexander says the officer told the man to halt while stepping back. Alexander says the officer then fired two shots when the man didn't stop. Their identities weren't released.

Alexander said at a news conference that no weapon was found and the Georgia Bureau of Investigation has taken charge of the investigation.