UPDATE: 6/3/21 

The Fire Investigation Unit has determined the cause of this fire to be a failure of the secondary phase of the Gulf Tower's electrical system, which is NOT part of Duquesne Light Company's infrastructure. 

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Original Post:

Just before 9:45 p.m., Pittsburgh Bureau of Fire responded to a residential structure fire in the 4100 block of Main Street.

The fire quickly escalated to three alarms. All of the residents managed to safely evacuate the building.

There were exposures on both sides of the main fire building with some extension to one of the adjacent structures.

Pittsburgh Police helped secure the area where large crowds had gathered. EMS was on scene, but there were no patient transports to the hospital and no injuries to firefighters.

The Fire Investigation Unit is investigating the cause.