NORTHBOROUGH, Mass. (AP) — A 16-year-old died and several other people were injured in a shooting at a large house party in the central Massachusetts town of Northborough early Sunday morning, authorities said.

Three people were arrested on firearms-related charges and will be arraigned on Monday, authorities said.

A partygoer flagged down a police officer shortly after 1 a.m. and said someone at the property had brandished a gun, authorities said. When officers arrived at the property, they heard multiple gunshots.

Police encountered a chaotic scene, with about 300 people at the party, said Worchester County District Attorney Joseph Early.

The 16-year-old was taken to the hospital where he was pronounced dead, Early said. Another shooting victim, a 17-year-old male, and two other people were treated at the hospital and released, he said. 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.