Florida ? A man who was supposed to be returning divorce papers at a courthouse pulled out a gun there instead Wednesday in St. Petersburg, Fla., opening fire in the lobby before two bailiffs fatally shot him.

Several people were in the lobby at the time, but only one of the bailiffs, who was shot in the shoulder, was injured. He was treated and released from a hospital.

Glen Lee Powell, 30, entered the courthouse shortly after 1 p.m. and approached a security checkpoint wearing a backpack. A deputy ordered him to remove the backpack and place it on a conveyor belt, but instead he threw it on the ground and opened fire with a semiautomatic handgun, Pinellas County Sheriff’s Sgt. Jim Bordner said.

Deputies B.J. Lyons and Deputy Marvin Glover returned fire, seriously wounding Powell, who later died at a St. Petersburg hospital. Lyons, a 58-year-old firearms instructor, was wounded.