St. Louis County police say an 11-year-old boy fatally shot a 16-year-old intruder during a home invasion.

Sgt. Brian Schellman says officers responded Thursday afternoon to a report of a shooting at a north St. Louis County home.

He says officers arrived to find the 16-year-old boy dead inside.

Police believe the teen made it inside the home on his third attempt to break in and say the 11-year-old shot him in the head.

Schellman says a 4-year-old girl was also inside. Neither she nor the 11-year-old was hurt.

Authorities have not identified the second suspect, who they say fled but was found a short time later.

Schellman says the children's mother wasn't home during the incident but is cooperating with an investigation.