ST. PETERSBURG, Florida (AP) -- A man who was supposed to be returning divorce papers at a courthouse pulled out a gun instead Wednesday, opening fire in the lobby before two bailiffs fatally shot him.

Glen Lee Powell, 30, entered the courthouse wearing a backpack shortly after 1 p.m. and approached a security checkpoint. A deputy ordered him to remove the pack 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 Marvin Glover returned fire, seriously wounding Powell, who later died at a St. Petersburg hospital. Lyons, a 58-year-old firearms instructor, was wounded.

A representative speaking for Powell's family said he had been living with his parents after returning from duty in the Air Force in California.