UPDATED: Workers at GM's Oshawa Assembly Plant hold work stoppage over closure

Unionized workers at the General Motors assembly plant in Oshawa, Ont., are returning to work after holding another sit-down protest over the planned closure of the plant.

The union confirmed a work stoppage Wednesday morning, later saying they were returning to the assembly lines.

A similar protest was held Tuesday.

The protests come after Unifor president Jerry Dias sat down with GM Tuesday to discuss options to keep the plant open.

The company has said the options suggested by the union -- including extending the life of the Chevy Impala and Cadillac XTS produced at the plant or shifting production slated for Mexico to the plant -- are not economic.

David Paterson, vice-president of corporate affairs at GM Canada, says the union should instead work with the company on timing and transition plans for the close to 3,000 affected jobs.

GM said it has identified job opportunities, is willing to pay for retraining and is open to negotiations on packages for workers on top of what is already included in contracts.