A 15-year-old boy was shot dead after a bullet went though an apartment window early Sunday on the South Side.

The boy -- identified by the Cook County Medical Examiner’s office as Kevin Jones -- was at a party in a first floor apartment in the 7800 block of South Carpenter Street when he was shot about 2:15 p.m., police News Affairs Officer Robert Perez said.

Jones was pronounced dead at 2:56 a.m. at Advocate Christ Medical Center in Oak Lawn.

Prior to the shooting, there was an altercation at the party that moved outside, Perez said. One of three men involved in the altercation began shooting into the party and one of the bullets went through the window and struck the teen, police said.

Police said the boy was shot in the back. An autopsy is scheduled for later Sunday.

Calumet Area detectives are investigating, but nobody is in custody.