N.W.T. confirms 1st COVID-19 variant of concern The case reported at the Diavik Diamond Mine on March 29 is the B.1.1.7 variant first identified in the United Kingdom. Social Sharing Case detected at Diavik Diamond Mine March 29. No risk to public at this time, health authority says CBC News · Posted: Apr 01, 2021 8:06 PM CT | Last Updated: April 2 The Diavik Diamond Mine in remote, northeastern N.W.T. A case of COVID-19 among a worker there has turned out to be the territory's first instance of a variant of concern. The chief public health officer has said there is no risk to the public. (Rio Tinto)