(Reuters) - A 17-year-old boy wounded in Monday's shooting rampage at an Ohio high school has been declared brain dead, authorities said on Tuesday.

Russell King Jr. has been declared brain dead, although he still has a heartbeat, Cuyahoga County Medical Examiner's office administrator Hugh Shannon said.

King is the second victim to have died in the shooting at Chardon High School east of Cleveland. Three other students were wounded and remain hospitalized.