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.

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.

The cause of the blaze remains under investigation.