Nurses have staged a walkout at a Kaiser Permanente hospital in Los Angeles over a lack of progress in contract talks.
The unionized nurses took the action Wednesday at Kaiser's Sunset Boulevard medical center in Hollywood.
Union spokesman Leighton Woodhouse says at least 90 percent of the 1,100 nurses signed up for the walkout.
However, Kaiser spokesman Jim Anderson says he doesn't know how many are actually on the picket line.
The 24-hour strike protests what nurses say are refusals by Kaiser to address union staffing demands for the Sunset hospital, where the sickest patients are sent. They also accuse Kaiser of bargaining in bad faith during the past year.
Kaiser says it continues to bargain in good faith. Kaiser says its hospital is open and providing care to patients.
Copyright 2011 The Associated Press.