A fire that started Monday in the attic of a Brentwood apartment building has left at least seven people temporarily homeless and damaged eight apartments, authorities said.

About 65 firefighters from four departments raced to the two-story Heritage Garden Apartments on Fairfield Circle shortly after 1:14 p.m., when someone reported seeing flames, said Robert Kuehn, the fire marshal for the Brentwood fire district.

"The biggest challenge was that the fire was mostly in the attic of the building so it wasn't easily accessible," Kuehn said.

Firefighters had to knock holes in the roof and they had the blaze under control about 2 p.m., the fire marshal said.

Two top apartments in the two-story building had major damage, he said, and six others had less serious damage.

The Red Cross arrived to help seven residents, he said.

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Kuehn said it was too early to tell if the fire was suspicious and how it started, but he said Suffolk County police arson detectives were also investigating.

No one was injured in the fire, Kuehn said.