Entergy confirmed Wednesday that some of its employees at the Grand Gulf Nuclear Power Station near Port Gibson, Mississippi, have COVID-19 coronavirus.

“We are closely monitoring the health of our team members, its connection with COVID-19 and, like many U.S. companies, some of our team members have been impacted,” an Entergy spokesperson said in a written news release. “We are working closely with officials at the Mississippi State Department of Health. We are also following guidelines and recommendations from the Centers for Disease Control, leaning on active counsel from medical professionals and in contact with federal, state and local officials.”

The company did not confirm how many employees were affected.

“Our Grand Gulf nuclear plant is currently in its scheduled refueling and maintenance outage where more than $200 million in upgrades are being made so the facility can operate for the long-term,” the spokesperson said. “Our more than 800 nuclear professionals have been joined by hundreds of experienced contractors who are supporting the outage. As the outage nears completion, more contract workers are finishing up their duties at the plant, with the number now down to 150.”