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A campus police officer at the University of South Alabama fatally shot a naked freshman who authorities said repeatedly rushed the officer in a threatening manner.

At 1: 23 a.m. Saturday, an officer responded to a banging noise on the window of the police station.

"When an officer exited the station to investigate, he was confronted by a muscular, nude man who was acting erratically," the university said in a statement.

That student was identified as Gil Collar, 18, of Wetumpka, Ala.

Authorities said Collar repeatedly charged at the officer, despite verbal commands to stop. Hoping to defuse the situation, the officer drew his weapon and retreated several times.

Collar then knelt, according to police, before he got up and rushed the officer one final time.

When Collar ignored commands to halt, the officer fired his weapon, hitting the 18-year-old in the chest, police said.

Collar was knocked to the ground but managed to get up one more time to challenge the officer before he collapsed and died, police said.

Local prosecutors are investigating the shooting at the request of university police.

The officer involved in the shooting has been placed on paid administrative leave.