SACRAMENTO, Calif. (AP) — A judge has granted an injunction that will keep some University of California hospital employees from participating in a planned strike at UC's five medical centers.

Sacramento County Superior Court Judge David Brown issued the injunction on Tuesday in response to a request from the state labor board.

The American Federation of State, County and Municipal Employees, Local 3299, has called for a one-day strike on Wednesday. The union represents 21,000 UC patient care and service employees, including radiation therapists and MRI technicians.

The union called the strike in response to what it said was intimidation by UC management of employees who participated in a two-day walkout in May.

Union officials said they had agreed to exempt 50 critical care workers from the strike, and the judge's injunction was consistent with that plan.