A man fatally shot by authorities in Gainesville, Florida, allegedly had been walking around an apartment complex with an assault rifle.

According to a statement from Gainesville Police and the Alachua County Sheriff's Office, Robert Dentmond called 911 late Sunday to report he was armed and suicidal.

Authorities say Dentmond initially dropped his weapon when confronted but picked it up again after a few minutes and began walking toward a building.

According to the statement, Dentmond ignored several warnings from deputies and officers before he was shot. Dentmond was pronounced dead at a hospital.

The Florida Department of Law Enforcement is investigating. According to the statement, deputies and officers involved in the shooting will be placed on temporary administrative duties during the investigation.

Dentmond's age and hometown weren't released.