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As a tow truck pulls away with a damaged car, other cars on the left are being loaded along westbound Highway 24 in Orinda, Calif., on Friday, Feb. 14, 2014. Metal debris on the highway was the cause flat tires and severed fuel lines on about 20 cars near the St. Stephens Drive exit. (Laura A. Oda/Bay Area News Group)

LAFAYETTE -- About 20 cars were disabled with flat tires and at least one gas tank ruptured Friday morning after running over debris on Highway 24 in Lafayette, according to the California Highway Patrol.

Officers were called at 5:44 a.m. by a motorist traveling along westbound Highway 24 at Saint Stephens Drive reporting about 20 vehicles with flat tires, said Officer Eric Anderson.

The woman reported the flat tires were from debris in the roadway and asked for officer assistance in changing tires, Anderson said.

At least one of the damaged vehicles had a ruptured fuel tank. "I hit a big piece of metal in the road," said Tony King of San Ramon, who was on his way to work in San Francisco. "It was a big chunk of metal, it was probably about eight feet wide."

The impact threw his car into the air, and when he got out there was oil, gas and coolant leaking from the car, King said.

Crews were working to clean up the spill from that mishap, according to the CHP.

No injuries were reported.

Staff photographer Laura Oda contributed to this story.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.