BIDDEFORD — A fire in a downtown apartment building left one person dead, eight people homeless and forced Biddeford police to close a section of Main Street for several hours tonight.

The cause of the fire, which was reported around 5:25 p.m., remains under investigation by the State Fire Marshall’s Office.

Sgt. Joel Davis of the Fire Marshall’s Office said investigators will spend most of the night sifting through the four-story building at 29 Main St. looking for clues as to what might have started the fire.

The body of the person, who died in the fire, was also expected to be moved out of a first floor apartment tonight. Davis said he did not have enough information to identify the victim.

Biddeford Fire Chief Joseph Warren said two Biddeford firefighters had to be taken by ambulance to Southern Maine Medical Center. One firefighter complained of chest pain while the second firefighter was having difficulty breathing.