It happened around 3:50 a.m. in the 8200 block of Whittier Boulevard, near Paramount Boulevard, according to police.
The victim, a Latino man between 50 and 60 years old, was pronounced dead at the scene. His identity has not been released.
Police say the victim was not in a crosswalk.
No information was immediately available about the suspect vehicle.
It should have front-end damage, and it was last seen going westbound on Whittier Boulevard over a bridge to Montebello.
Anyone with information is asked to call the L.A. County Sheriff’s Pico Rivera Station at (562) 949-2421.