A nail factory has been shut down in Texas after a federal inspection found “serious issues” with the plant’s operations.

A federal inspection by the U.S. Occupational Safety and Health Administration found that at least 15 workers were exposed to asbestos during a four-month period beginning in April 2016, and that at a facility in Texas, four workers died.

Federal inspectors discovered that the plant in question, located in Dallas, had a “substantial” level of asbestos in its building, according to a statement from the U,S.

Department of Labor.

The agency said the workers had a respiratory illness that required hospitalization and other medical care.

The plant closed for three weeks following the inspection, and a company spokesman said the plant will re-open once the safety measures are in place.

The inspection found that the workers were “at risk of occupational exposure to asbestos,” the statement said.

The workers who died were not at risk of lung disease, the statement added.

The Occupational Health and Safety Administration has not yet confirmed whether the workers died from asbestos, or if any of the workers tested positive for asbestos.

In a statement to the Associated Press, a spokesman for the U-S.

attorney’s office in Texas said that the company is cooperating fully with the investigation.

The statement said the company “is committed to ensuring a safe and sustainable future for all our workers.”

A federal court in San Antonio ruled in June that the Texas Occupational Security and Health Board had to close the nail manufacturing facility and put the workers on leave.

It said the agency’s findings were based on “misleading and incomplete information” and “exceeds the scope of its authority” by failing to include a full accounting of the safety risks.