PITTSBURGH — Emergency crews are responding to a structure fire in Pittsburgh.

An Allegheny County 911 supervisor says crews were called to the 4500 block of Penn Avenue in Bloomfield at 3:24 p.m.

A 3rd alarm has been struck, the supervisor says.

It’s unclear if anyone has been injured.

A video shared with Channel 11 shows heavy flames coming from a building. Another video shows dark smoke rising over part of the city.

Our crew on scene saw multiple houses with damage.

Check back for updates on this developing story.

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