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.

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

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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.

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