PITTSFIELD -- A Monday night fire displaced three Pittsfield families from their homes.

At about 9:15 p.m. on Monday, Pittsfield Fire Department responded to a fire at 23 Dartmouth St., a multiple-family house, said Pittsfield Fire Chief Robert Czerwinski.

He said that the fire started in the upstairs unit and extended into the attic but was under control in about 45 minutes. No injuries were reported, and the cause is still under investigation.

Three families currently live in the building, and the fire originated in the fourth unit that had recently been vacated. Irv Jones, who lives with his son and grandson next door, called the fire in.

"I opened up the attic door, and smoke came out," Jones said. "I only made it halfway up the [attic] stairs, and couldn't make it up any further."

The families rounded up their cats, called 9-1-1 and then headed out.

Many tenants on the scene were worried for their cats, asking officials to check if they were still inside. Jones and his family were still looking for their black cat named Puma.

The Berkshire County Red Cross was called in since families were not allowed to stay the night in the building, Czerwinski said.