Ottawa firefighters were called early in the morning to a fire that caused serious damage to three single-family homes in Orléans.

Ottawa Fire Services said they were called to a home in the 2000 block of Noblewood Way around 5:45 a.m.

Upon arrival, firefighters saw visible flames coming through the roof of one of the homes, with the fire also spreading to two neighboring homes.

Ottawa paramedics were called to the scene and treated a firefighter who suffered second-degree burns. Another man suffered minor burns and a woman was treated for minor smoke inhalation.

All were released on the spot.

All residents have been accounted for and will be evacuated from the fire.

The fire was brought under control shortly after 6:50 a.m. Firefighters remain on site to monitor possible outbreaks.

An Ottawa Fire Department investigator was dispatched to the scene to investigate the cause and origin of the fire.