Employees at Fiat Chrysler Automobiles' Windsor Assembly Plant were so concerned about possible coronavirus exposure this week that they refused to work.

The company said there are no confirmed cases at the plant, but that one of the workers had been out on self-quarantine because of possible secondary contact, presumably related to Covid-19.

It took a visit and determination that conditions were safe from the Canadian Ministry of Labour to help resolve the issue. Production, which shut down Thursday afternoon, has since resumed, according to the company.

"The Ministry of Labour visited the plant on March 12 to investigate, and determined our protocols and work environment to be safe. We worked with the local union and Unifor leadership as well as government officials to address this issue," the company said in a statement. Unifor is the union, which represents Canadian autoworkers. "We continue to monitor the situation carefully and take precautions to safeguard the health and welfare of the FCA family."

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The plant, which had more than 5,800 workers as of January, makes the Chrysler Pacifica.

A message seeking comment was sent to a union official.

Contact Eric D. Lawrence: elawrence@freepress.com. Follow him on Twitter: @_ericdlawrence.