A pedestrian suffered life-threatening injuries after stepping into traffic in the Mission District early Friday morning, according to police.

The pedestrian, a 33-year-old man, was walking on Mission Street near 20th Street around 12:33 a.m. when he stepped into traffic and was struck by a vehicle, police said.

He then struck a second vehicle and was knocked unconscious, suffering facial fractures in the crash, police said.

The man was taken to the hospital for treatment. No arrests were made, police said.