June 25 (UPI) — Authorities in northern Canada on Thursday confirmed that three people are dead after a plane responding to forest fires in the Northwest Territories crashed the night prior.

NWT Fire said responders were able to access the crash site on Thursday and confirmed the fatalities.

“Our organization is grieving alongside the families, friends, colleagues and the broader wildfire community as we process this unthinkable loss,” it said in a statement.

“We will honor those who lost their lives in the line of duty at the appropriate time and in accordance with the wishes of their families.”

The bird dog aircraft, with three people aboard, crashed Wednesday evening near Fort Simpson where it was deployed along with an airtanker group to fight a nearby wildfire.

Though the identities of the victims have not been made public, Yellowknife-based Buffalo Airways confirmed one was an employee.

“It is with heavy hearts that we confirm the loss of one of our aerial firefighting pilots while actioning fire west of Fort Simpson,” Buffalo Airways said in a statement.

Buffalo Airways said the involved plane was a Turbo Commander 690 aircraft operating as a bird dog during the wildfire operations.

The Transportation Safety Board of Canada announced in a statement that it is deploying investigators to the scene.

“My thoughts are with the families of the pilot and two firefighters who died in the plane crash near Fort Simpson,” Prime Minister Mark Carney of Canada said in a statement.

“Protecting Canadians from wildfires requires profound sacrifice and courage. We owe them our deepest gratitude.”

Officials were responding to 19 forest fires throughout the territory Thursday.

The aircraft involved in the Wednesday evening crash was supporting wildfire suppression efforts on FS009-26, a lightning-caused fire located in the Marten Hills area.

Officials said Thursday night that the fire was about 100 hectares and responders were working to suppress its growth. It presented no risk to communities, infrastructure or buildings, they said.