NORTHBOROUGH, Mass. (AP) — A shooting at a large house party in the central Massachusetts town of Northborough early Sunday morning left a 16-year-old dead and another teen injured, authorities said.

Three people ranging in age from 19 to 27 who are not from Northborough were arrested on firearms-related charges and will be arraigned Monday, said Worchester County District Attorney Joseph Early Jr.

A partygoer flagged down a police officer shortly after 1 a.m. and said someone displayed a gun in the house, Northborough Police Chief Brian Griffin said. When officers arrived at the property, they heard multiple gunshots.

Police encountered a chaotic scene with about 300 people at the party, Early said.

The 16-year-old, from the Bellingham, Massachusetts, area, was taken to the hospital where he was pronounced dead, Early said. Another shooting victim, a 17-year-old male, was treated at the hospital, Early said. Two other people were treated at the hospital, and several others with visible injuries were treated at the scene but declined to be taken to the hospital.

Authorities are asking anyone with information or cell phone video from the scene to contact the Northborough police.