FLATBUSH - Officials say about a dozen families are homeless tonight after a fire ripped through their Flatbush apartment building.

The fire chief tells News 12 Brooklyn that all 13 units at 2156 Cortelyou Road were badly damaged. Officials say the fire started on the bottom floor of the four-story building just before 5 p.m. and quickly spread up to the roof.

More than 140 firefighters worked to put out the flames for about an hour. Officials say one firefighter suffered a minor injury, but is expected to be OK.

The Red Cross is working with the displaced tenants. It is unclear when they'll be allowed to return.