Pittsburgh firefighters responded early this morning to a fire in the U.S. Steel Tower in Downtown.

According to a release by the city’s department of public safety, firefighters responded to the fire at Pittsburgh’s tallest building at about 4:45 a.m., but found that a small fire in a custodian room in the lower level of the building had already been extinguished by the building’s sprinkler system.

There were no injuries and only minor damage, according to the release.

First Published: January 31, 2016, 1:54 p.m.