MASSAPEQUA, NY (CBS New York) – An early-morning fire swept through a two-story Long Island home Thursday leaving two people dead and another injured, fire officials said.

Fire Marshals supervisor Vincent McManus tells 1010 WINS’ Mona Rivera that the homeowner desperately tried to save his sister and her husband

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The fire at 23 Nancy Place in Massapequa was called in at 4:06 a.m. It took firefighters an hour to bring  the blaze under control.

The sister and brother-in-law of the homeowner, who lived in a garage apartment attached to the home, were killed. Nassau County Police identified the victims as 54-year-old Gary Munsch and 51-year-old Toni Munsch.

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Homeowner Leonard Chiaramonti, 56, suffered second degree burns to his face, arms and hands while trying to rescue the couple. A family friend from Florida, who was also staying at the home, was not injured.

Officials said two volunteer firefighters from the Massapequa Fire Department suffered minor injuries.

Officials said the fire was mostly contained to the apartment and that two smoke detectors in the home weren’t functional.

The cause of the fire is under investigation.

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