The fire began between 2pm and 2:30pm on Friday afternoon. The cause and severity of the fire are not immediately known.
The Transportation Safety Board said the loss of an Air Tindi aircraft outside Whatì was "not survivable" as officials work to recover crucial information.
Air Tindi's president, said staff were in "a lot of pain" following the apparent loss of two pilots, while Yellowknife residents praised rescuers' efforts.
Search teams arrived at the wreckage of an Air Tindi aircraft missing since Wednesday morning. Neither of the two pilots on board survived, RCMP said.
Rescuers searching for a downed Air Tindi aircraft were wading through deep snow in a bid to reach its possible location as night fell on Wednesday.
The NWT’s top baby names of 2018 are in, with four names tied at the top.
Andrew Debogorski, a well-known and much-loved Yellowknife resident, passed away on Friday evening in a house fire. His wife and two children are reported safe.
Allegations that hundreds of confidential medical records were found in Fort Simpson's dump would be "devastating for client trust" if true, an expert said.