A COVID-19 outbreak has been declared at Kirkland Lake Gold's Macassa Mine.
The outbreak is under investigation by the Timiskaming Health Unit.
A workplace outbreak is declared if there are two linked cases at a location within 14 days. The health unit did not confirm how many cases are at the mine.
The health unit is working with Kirkland Lake Gold staff for contact tracing and all high-risk contacts have been notified.
"Kirkland Lake Gold has strong infection prevention and control measures in place," said Dr. Glen Corneil, acting medical officer of health and CEO.
"These measures make a difference in preventing the spread of COVID-19 and they make managing an outbreak easier and more efficient."
This is the second outbreak at Macassa this year. The first was declared in early March.
On Sunday, the THU also declared an outbreak at Alamos Gold's Young-Davidson Mine near Matachewan.
There are also active outbreaks at two mines – Glencore's Kidd Mine and McEwen's Black Fox Mine – in the neighbouring Porcupine Health Unit region.
To date in the Timiskaming Health Unit Region, there have been 170 confirmed cases of the virus. Of those, 137 are resolved and two people have died. There are 31 known active cases.