Firefighters worked overnight to knock down the flames of a burning building in Worcester, Massachusetts.

It all happened at a commercial strip mall on Main Street, with the fire breaking out sometime around 8 p.m. Monday.

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No one was hurt in the fire, which turned out to be a challenging one for emergency crews to fight. First responders remained on scene Tuesday still working on their response.

Assistant chief of the Worcester Fire Department, Adam Roche, said that when crews arrived Monday night, they could see the flames coming from the building -- putting them into an offensive mode.

They performed what's known as a quick interior attack. But then, there was a partial floor collapse, and all firefighters wer

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