Twenty-three people living at a Hamilton residential care facility on the Mountain weren't able to return home after a fire caused an estimated $350,000 in damage Wednesday.

Emergency crews were called to the fire on Concession Street around 3:30 p.m. Road blocks were put up so the people in the building could be evacuated and police say no injuries were reported.

The Ontario Fire Marshall was called in to investigate after concerns were raised, but police say the investigation determined the fire was no longer considered suspicious.

In an email to CBC News Deputy Fire Chief John Verbeek said officials suspect the fire was caused by careless smoking.

Police say the road closures were removed around 7:30 p.m.