LOS ANGELES (CBSLA) — Thousands of psychiatrists, therapists, and psychiatric nurses are on strike from Kaiser Permanente facilities.

Picket lines went up Tuesday at a Kaiser location in Fontana.

READ MORE: Fox, Hield Lead Kings Over Lakers 141-137 In Triple OT

The National Union Of Healthcare Workers want staffing increases and shorter wait times for mental health patients.

READ MORE: LAPD Releases Video Of Officer Using Taser Gun On Man With Sword

The strike is set to continue throughout the week at various locations in L.A. and Orange County.

Kaiser says the worker’s union rejected the latest offer.

MORE NEWS: Black Friday: Another High-End Store Is Robbed, Prompting LAPD To Issue City-Wide Tactical Alert

Despite the strike, Kaiser hospitals and medical offices will stay open.