UPDATE, 9:01 a.m.: Philadelphia police say 20 or 21 cars were damaged or destroyed in the fire.
The cars were parked in an auto dealer's lot on the 10000 block of Sandmeyer Lane.
Metro's original story is below:
Up to 18 cars reportedly were engulfed by flames in a Northeast Philadelphia parking lot overnight.
Firefighters put out the fire in the city's Somerton section after 4 a.m., but not before more than a dozen cars were either damaged or destroyed by the flames, 6ABC Action News reports.
The parking lot where the fire happened is on the 10000 block of Sandmeyer Lane, near Red Lion Road.
The fire's cause remains under investigation.