Detroit officials are asking a judge to order striking water and sewer department workers to end their strike against a system serving about 4 million southeastern Michigan residents.
Employees of Detroit's water and sewer system went on strike Sunday to protest plans to eliminate most of their jobs through privatization or other measures.
The union for 950 employees of the Detroit Water and Sewerage Department approved the strike last week.
Michigan law prohibits public employee strikes.
Water department spokeswoman Mary Alfonso says the city requested the court order Friday and says strikers could face suspension or dismissal.
Proposed job cuts in the Detroit water system follow an April agreement between Bing and Gov. Rick Snyder to head off a state takeover of the city's finances because of persistent budget deficits.