A motorcyclist was being chased by California Highway Patrol Sunday night, at one point reaching speeds of over 100 mph.
El Monte police were the first to tail the driver, until turning it over the the CHP.
Newschopper4 was over the pursuit at 11:10 p.m. It was unclear what lead to the pursuit.
Ground police units appeared to pull off of the chase due to the speed and distance.
This is a developing story. Refresh for updates.