LOS ANGELES - Authorities are pursuing an alleged stolen big rig cab in Southern California Wednesday morning.

Fontana police and California Highway Patrol officers are chasing the suspect, who is in the Fullerton area.

The chase reportedly began in San Bernardino County.

SkyFOX over the scene showed what appeared to be at least two people inside the semi.

By 10:30 a.m. the semi appeared to get back onto the westbound 91 Freeway near Anaheim Boulevard.

This is a developing story. Check back for updates. Police Chases Instastories

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