COSTA MESA, CA — Traffic was slowed considerably after a motorcycle crash on the California State route 405 Freeway Friday morning injured at least one person, authorities said.

The crash was reported at 8:52 a.m. on the southbound side of the freeway near Bear Street in Costa Mesa, according to the California Highway Patrol.

At least one person was injured in the crash. Their status was not immediately known.

The incident blocked two lanes on the freeway, prompting authorities to issue a SigAlert.

It was not immediately clear when the SigAlert would be lifted.

Residents were urged to steer clear of the area.