Watch Pittsburgh FFs Battle 4-Alarm Restaurant Blaze

At least one Pittsburgh firefighter was injured as flames tore through the roof of a Market Square building complex in the city's downtown Thursday.

Flames shot through the roof of a Pittsburgh restaurant Thursday as crews battled a large four-alarm blaze that sent at least one firefighter to the hospital.

The fire broke out at about noon at Winghart's restaurant in city's Market Square area downtown, KDKA-TV reports. Police evacuated the building complex as firefighters worked to get the blaze under control.

“It’s a tough fire, for sure. Older building, a lot of wood up top, as you can see, and all those buildings connected," a Pittsburgh Public Safety spokeswoman told KDKA. "That’s why the first order of business was to get everyone out of there."

One firefighter suffered heat exhaustion battling the blaze and was taken to the hospital. Details concerning his condition were not released.

Crews were able to get the fire under control by about 1 p.m. The cause of the blaze is still under investigation, but officials told KDKA that they believe it started in a chimney before spreading to the roof.

Winghart's has been the site of two previous fires, one in 2014 and another in 2012, the TV station added. Thursday's blaze erupted a day before Pittsburgh's Light Up Night holiday event, which involves music, shopping and a tree lighting in Market Square.

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