Fire on roof sends smoke billowing over Center City Philadelphia

PHILADELPHIA (WPVI) -- Heavy smoke could be seen billowing from a high-rise in Center City Philadelphia on Sunday morning.

The flames broke out around 11:30 a.m. Sunday near Market and 20th streets.
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Officials say there was a small fire on the roof of the building.

No one was inside at the time of the fire and no injuries were reported.
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The cause of the blaze remains under investigation.