The 17-year-old Largo boy who apparently shot himself in the head in a game of Russian roulette Friday night has died, the Pinellas County Sheriff's Office said.

Detectives said Thorin R. Montgomery died overnight Saturday at St. Petersburg's Bayfront Medical Center.

Russian Roulette is a lethal game of chance in which a player places a single round in a revolver, spins the cylinder, places the muzzle against his or her head and pulls the trigger. The game originated in Russia.

Investigators believe Montgomery and three friends were playing the game with a .38 caliber revolver at Montgomery's home on the 11100 block of 111th Way in Largo. The friends have not been identified, but they were 19, 18 and 16 years old.

According to investigators, Montgomery was the first of his friends to have a turn at the game. The gun discharged, and he received a gunshot wound to the head.

Deputies and emergency personnel were called to the home at 7:45 p.m. and found Montgomery with life-threatening injuries. He was airlifted to Bayfront Medical Center in very critical condition.

The medical examiner will conduct an autopsy, the sheriff's office said.