IRWINDALE — A 39-year-old Azusa man died late Saturday after jumping from a car being driven by his mother on the 210 Freeway and then being struck by another vehicle, officials said.

Paramedics pronounced Mark Anthony Munoz dead at the scene shortly after 10:46 p.m. incident on the westbound 210 Freeway, according to California Highway Patrol Officer Aaron Ford.

He was a passenger in a 2007 Toyota Yaris being driven by his mother, a 62-year-old Azusa woman, Ford said.

“For reasons yet unknown, Mr. Munoz opened the right front passenger door and jumped out of the moving Toyota,” the officer said in a written statement.

As Munoz tumbled in traffic lanes, a 27-year-old El Monte man driving a 2002 Honda Accord was unable to avoid hitting him, Ford said.

Both cars pulled over to the freeway shoulder following the incident.

All four lanes of the westbound freeway were shut down until about 1:30 a.m. as officials investigated the scene, Ford said.

Any witnesses were encouraged to contact the Baldwin Park office of the CHP at 626-338-1164, or after hours, the Los Angeles Regional Traffic Management Center can be reached at 323-982-4900.