A tentative contract agreement has been reached between the University of Illinois and striking graduate workers at the Urbana-Champaign campus.

Hundreds of classes have been canceled and dozens more relocated as a strike by graduate employees at the University of Illinois Urbana-Champaign continues into a second week. On Tuesday night, graduate workers occupied the office of university president Tim Killeen. Strikers have a variety of demands, but one of the most contentious points focuses on the future of tuition waivers -- and whether some graduate workers will have to pay tuition while employed in academic positions on campus.

The graduate workers’ strike on the University of Illinois Urbana campus enters its second week Monday, after talks with a federal mediator Sunday yielded no progress toward an agreement.

Graduate employees on the University of Illinois Urbana campus begin the second day of their strike Tuesday. A university spokesperson says that they know of 53 people who withheld their work in teaching or research Monday, and 27 classes that were cancelled because of the strike.

The union representing graduate employees at the University of Illinois’ Urbana campus is going on strike. That announcement came Sunday from the Graduate Employees Organization, after a five-hour negotiating session with a federal mediator failed to produce a contract agreement.