More than 60 firefighters from seven Suffolk volunteer departments fought for more than an hour to contain a blaze that swept through a Middle Island apartment building Sunday evening.
At least 19 residents were displaced after their homes were engulfed in smoke and flames, officials on the scene said.
The fire, at 302 Lake Point Dr., gutted four apartments and damaged two others in the building, said Debbie Tunjian, spokeswoman for the Middle Island Fire Department.
Firefighters from Middle Island, Yaphank, Ridge, Rocky Point, Gordon Heights, Miller Place and Brookhaven National Laboratory's Rapid Intervention Team responded to the 6 p.m. call about a fire at the complex and worked for more than an hour to contain the fire.
Residents were evacuated and no major injuries were reported, but a Middle Island Fire Department firefighter was transported to a nearby hospital after falling ill, Tunjian said.
"When they arrived they saw flames extending through the roof, it was a high-pressure situation," Tunjian said.
The Brookhaven Town Fire Marshal's Office and Suffolk Arson Squad is investigating the cause of the blaze and whether it originated from inside or outside of the apartment building, Tunjian said.
Middle Island Fire Chief Matthew Gropper said it appeared the fire started outside of the building, but investigators would make the final call.
"They'll sort through the rubble for that," Gropper said.
Red Cross volunteers were on hand to provide housing assistance for displaced families, she said.