OSHKOSH, Wis. (AP) — Oshkosh police say a disturbance involving three people resulted in a fatal exchange of gunfire.

Authorities say an 18-year-old Appleton man is dead as a result of Sunday night's shooting. The victim was pronounced dead at a local hospital.

A 25-year-old man was treated for a gunshot wound, treated at the hospital and released. Police are looking for the third person involved in the disturbance.

Officials say the shooting appears to be an isolated incident.