CAMBRIDGE, Mass. — Dining hall workers at Harvard University have gone on strike over wages and health care benefits.

Dozens of workers started picketing at the Ivy League school on Wednesday morning.

The strike started after months of negotiations by the dining workers’ union, Unite Here Local 26, and Harvard administrators, failed to lead to a new contract.

The union says the university’s health care proposals are unaffordable to the workers. The university says the workers already receive generous wages and benefits when compared to other food service workers in the region and that changes to health plans are “modest.”

Some Harvard dining halls remain open and the university says it has a contingency plan to make sure that all students are fed.