Two firefighters sustained burns while battling a blaze that damaged three homes Thursday in Uniondale, a fire official said.

Assistant Chief Nassau County Fire Marshal Michael F. Uttaro said one of the injured firefighters was admitted to the burn unit at Nassau University Medical Center in East Meadow with "serious" burns to his hands.

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Details on the other firefighter's injuries weren't immediately available. A third firefighter was taken to the hospital for observation after experiencing chest pains at the scene.

The fire caused "heavy damage" to the home on Argyle Avenue in Uniondale and was reported in a 911 call around 9:15 a.m., Uttaro said.

About 100 firefighters from seven departments, led by Uniondale, responded to the scene, Uttaro said. He said two homes adjacent to the house where the fire started suffered "moderate damage."

Uttaro said the cause of the fire appears not to be suspicious, but remains under investigation.