The incident occurred in Sullivan County around 9:30 a.m. Monday, Nov. 18, in Wurtsboro.
According to New York State Police Trooper Steven Nevel, the preliminary investigation revealed that the victims were exposed to carbon monoxide and experienced varying degrees of exposure.
The victims were identified as Baoli Xu, age 55, and Haijun Wang, age 63, both from Wurtsboro, as well as a 66-year-old man from Flushing.
Nevel said the 66-year-old victim, whose name is being withheld pending family notification, succumbed to the exposure and was pronounced dead at the scene.
Xu and Wang were found unconscious inside the building and were removed by emergency responders. Troopers and Wurtsboro EMS performed life-saving efforts on both victims.
Xu was airlifted to Westchester Medical Center in Valhalla, while Wang was transported to Ellenville Hospital. Both victims are currently in stable condition.
The Wurtsboro Fire Department disconnected the fuel sources and cleared the building to prevent further exposure.
The incident is still under investigation.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Spring Valley and receive free news updates.