The State Fire Marshal's Office is investigating a double-fatal fire in Machias.

UPDATE: The office of the Chief Medical Examiner has identified the men as 36-year-old Wilfred Gross and 35-year-old Christopher Harrison. The cause of death is still under investigation.

Officials say the early Monday morning fire was in a mobile home, located in a mobile home park on Armstrong Lane in Machias. Fire personnel found two people deceased at the residence. Now, they're working on determine how the fire started and the victims' cause of death.

A neighbor told WVII-TV that he was able to help three others to safety. He was awakened by his dog, who first detected the fire.

We'll update this story as more details become available.