A fast-moving fire broke out late Wednesday night in Gowanus, leaving two people injured.

The fire started just before 10:30 p.m. at a home on 9th Street between 3rd and 4th avenues.

Citizen video from the scene shows thick smoke as firefighters used multiple ladders to battle the flames. Crews were also seen entering the home next door and working on the roofs of both buildings.

The fire started on the second floor of the three-story building. Firefighters were able to get the fire under control in about an hour.

Officials say two people were hurt—one person refused medical treatment, while the other was taken to the hospital but is expected to be okay.

The FDNY is still investigating what caused the fire.