Two people were injured after an early morning apartment fire in Norwood that may have been intentionally set, according to the FDNY radio from the scene.

Fire officials say the blaze broke out shortly after 7:30 a.m. Friday inside a five-story apartment building on Decatur Avenue. Nearly 80 firefighters and EMS personnel responded to the scene and brought the fire under control in under an hour.

Radio transmissions from firefighters responding to the scene indicated crews were searching the building for a person who may have been lighting fires while first responders worked to contain the blaze.

“Are they still in the building lighting a fire?” One firefighter can be heard asking over the radio, referring to an "emotionally disturbed individual" on the fourth floor.

Video from the scene showed firefighters climbing fire escapes while thick smoke poured from the side of the building, as crews worked to prevent the fire from spreading.

Officials initially believed an emotionally disturbed person may have started the fire on the building’s fourth floor, though the FDNY says the exact cause has not yet been confirmed.

Two people were injured in the incident, including a firefighter. Paramedics say both victims suffered minor injuries and are expected to recover.

The FDNY says the cause of the fire remains under investigation, and it has not confirmed whether the incident is being treated as arson.