A fire destroyed a Bay Shore factory early Sunday morning, fire officials said.

The Brentwood Fire Department received a 911 call at 4:57 a.m. reporting a fire at 26 Cleveland Ave., a department spokesman said. The fire, which resulted in a partial building collapse, was contained at 6:23 a.m. No injuries were reported.

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Inter Molds, Inc., an industrial mold manufacturer, is located at the address of the fire, according to online records and fire officials. A company representative could not be reached for comment.

Firefighters from departments in Central Islip, Commack, Deer Park and West Islip assisted.

Officials from the Suffolk County Arson Squad and the Islip Town Fire Marshall are investigating the cause of the fire, which is unknown, the department spokesman said.