A fast-moving wildfire swept across a freeway Friday in a Southern California mountain pass, torching at least a half-dozen cars and a tractor trailer as motorists abandoned their vehicles and ran to safety. There were no confirmed injuries, authorities said.
At 6 p.m. (PT), officials said 20 vehicles had been destroyed by the 3,500-acre wildfire.
At one point Friday afternoon, San Bernardino fire officials said their air response was delayed because of drone activity.
Scroll down to see social media photos of the wildfire.
The fire swept by desert winds burned on both sides of Interstate 15, the main connector between Southern California and Las Vegas that was crowded with vehicles.
Dozens of vehicles were abandoned and hundreds of others turned onto side roads to get away from the flames as water-dropping helicopters flew overhead.
Motorists stuck on the road described a harrowing scene.
U.S. Forest Service spokesman Uriah Hernandez said no injuries had been confirmed. Some areas were evacuated in the Cajon Pass area along the freeway, about 55 miles northeast of Los Angeles.
The fire led authorities to shut several freeway lanes, causing traffic to back up for miles.
California Highway Patrol spokesman Steve Carapia said 50 to 75 vehicles were left abandoned on the freeway.
The Associated Press contributed to this report.