NEW YORK (AP) — Authorities say three members of a family found dead with stab wounds inside a burning New York City apartment were killed in an apparent murder suicide.

The blaze broke out at 4:50 a.m. Tuesday inside a sixth-floor apartment in Queens.

Police say the victims — a 50-year-old man, his 54-year-old wife and their 15-year-old son — all were found near the entrance.

The medical examiner's office will determine the cause of death. The cause of the fire is under investigation.

Three firefighters suffered minor injuries.

Authorities say the fire was confined to the apartment. It was brought under control before 5:30 a.m.