COLUMBUS, Ohio (AP) _ Union workers at Ohio State University rejected a tentative contract Friday, extending a 5-day-old strike that has closed cafeterias and curtailed campus services.

About 1,900 custodians, food service workers, bus drivers and other employees represented by the Communications Workers of America Local 4501 went on strike Monday, mainly for higher wages.

A tentative agreement reached early Thursday between the union's leaders and school administrators was rejected by the union, 845-to-330.

University spokesman Dave Ferguson said there were no immediate plans to resume negotiations.

Managers and nonunion workers have provided enough essential services on the 48,000-student campus to keep it and its medical center running.

The rejected proposal included raises of $1 an hour to groundskeepers, custodial workers and food service employees, and increases of 50 cents an hour in each of the following two years.

The workers, whose contract expired March 31, want an immediate $2-an-hour raise.