ST. LOUIS (AP) — Police in St. Louis County say that a 15-year-old has turned himself in following a 3-year-old boy’s shooting death.

County police spokesman Brian Schellman said the toddler was shot once in the abdomen Monday morning at a home near Florissant and died later at a local hospital. He said investigators don’t yet know if the shooting was an accident.

The 15-year-old is described as a family friend who ran from the home on foot and was missing for several hours. Several adults were reportedly in the home at the time.

The St. Louis Post-Dispatch reports that the child was identified by family members as Xzavier “Zae” Robinson.

Shawmane Robinson tells KTVI-TV that he was asleep when his son was shot.