Updated

A 15-year-old's birthday party in New Jersey has ended in gunfire, leaving one teenager dead and four others hurt.

The gunshots erupted late Friday in Hamilton Township. It's not yet clear what prompted the shooting.

Mercer County prosecutors say 17-year-old Shakir Williams of Trenton was shot to death.

They say a 17-year-old boy is hospitalized in critical but stable condition with wounds to the torso, arms, leg and groin.

Two other teens, ages 17 and 18, were shot in the leg, while a fourth victim was hit in the calf. They were treated at a hospital and released.

Authorities say dozens of people attended the party. No arrests have been announced.