PALM SPRINGS, Cali. -

A Twentynine Palms man killed in a motorcycle crash on Interstate 10 was identified by the Riverside County coroner's office Sunday.

Joshua Vielstich died after his motorcycle slammed into a car on the westbound side of Interstate around 8:15 p.m Saturday, according to the coroner's office.

The 21-year-old was pronounced dead at the scene, about 1.1 miles west of North Indian Canyon Drive in Palm Springs.

Authorities have not said what caused the crash.