Videos on social media of young people skateboarding on freeways in Los Angeles and San Diego counties have emerged in recent weeks, prompting the California Highway Patrol to investigate.

@junebugg_93 also gets its donee #dustboys #FREEWAYCHALLENGE A video posted by @lilrahj on Apr 30, 2016 at 3:39pm PDT

"We are aware of skateboarding on the freeways in downtown and parts of L.A. There has been social media and there have been hashtags appearing with a challenge to skateboarders," said CHP Officer Jose Nunez. "These are not safe places and weren't designed for that kind of thing.... This is an enforceable action and if we can identify any one or vehicle action will be taken against those individuals."

WHY BRO HAVE TO 3FLIP INTO THE BANK?!!! @R0B.NASTY GO BRAZY #FREEWAYCHALLENGE ¿¿¿¿¿¿¿¿ A video posted by ¿¿¿¿¿¿¿¿ ® (@alohajahkoda) on Apr 28, 2016 at 4:03pm PDT

In several videos, young people jump out of cars and skateboard through traffic.

Nunez said last year the agency saw a spate of bicyclists on freeways. "They would ride between ramps in the slow lane," he said.

The skateboard videos were first reported by LAist.

ALSO

Suspect in custody in fatal stabbing of toddler

Federal prosecutors drop case against Bay Area pot dispensary

Suspect in custody in fatal stabbing of toddler