PITTSFIELD, Mass. — A fire at a multi-unit building at 24-26 John St in Pittsfield required a second alarm response from the Pittsfield Fire Department.

Fire crews were initially called to the scene for a reported structure fire. Car 2, arriving first, reported "nothing showing," however firefighters eventually found heavy flames in a first-floor apartment on the 24 John St side of the building.

Engine 3 stretched a handline to attack the blaze. Heavy black smoke billowing from the second floor, a second alarm was called, bringing all on-duty personnel and apparatus to the scene.

Firefighters worked for approximately 40 minutes to get the fire under control. While Engine 3 battled the main fire, other crews were busy stretching backup lines, searching the building, handling ventilation, and setting up a Rapid Intervention Team (RIT).

No civilians or firefighters were injured in the incident.

Eversource and Berkshire Gas were called in to secure the utilities. The American Red Cross is now assisting four adults who were displaced by the fire, providing them with housing and other necessities.

The cause of the fire is currently under investigation by the Pittsfield Fire Department Fire Investigation Unit, the Pittsfield Police Department Investigation Unit, and investigators from the State Fire Marshalls Office.