BROOKLYN, N.Y. - It's not clear what caused a big house fire in Brooklyn Monday night.

The call came in around 8:40 a.m. for a house located at 312 Parkville Avenue in Kensington.

Investigators say the fire started on the top floor, then spread to the house's cockloft and the building next door.

One firefighter was hurt while putting out the flames.

No other injuries were reported.

The Red Cross is helping 34 people who were displaced by the fire.