DECATUR, Ga. (AP) — Police say the suspect in a Georgia school shooting had nearly 500 rounds of ammunition with him.

DeKalb County Police Detective Ray Davis says police believe that suspect Michael Brandon Hill got the AK 47-style rifle from an acquaintance. But he said at a news conference that it's not clear if he stole the gun or borrowed it.

No one was injured in the ordeal Tuesday at the school in Decatur, but police say the suspect exchanged gunfire with officers. They say he also fired once into the floor of the school office.

DeKalb County Police Chief Cedric L. Alexander says officers had to assume that Hill wanted to harm somebody.