Rescuers search for missing helicopter travelling from Calgary believed to have crashed in B.C.

UPDATE, Sunday, Jan. 7:1 person confirmed dead after helicopter crashes east of Revelstoke, B.C.

Rescue crews are actively trying to find a helicopter that is believed to havecrashed after it went missing east of Revelstoke, B.C., in Glacier National Park on Friday.

An RCMP spokesperson told CBC News they received a report of a missing helicopter shortly before 7 p.m. PT Friday.

Capt. Pedram Mohyeddin, a spokesperson for Maritime Forces Pacific, saidthe forces had received word of an overdue private helicopter at around 8:40 p.m. PT in the Revelstoke area.

Ground crews were still searching for the craft around 3:30 p.m. PT on Saturday and believe it "most likely" crashed, Mohyeddin said.

"The joint rescue co-ordination centreis conducting this search as if it is a crashed helicopter, but there is no visual verification at this point," Mohyeddin told CBC News.

He said the craft believed to be missing wastravelling from Calgary to Sicamous, B.C., according to its flight plan, but Mohyeddin saidrescue crews don't know how many people were aboard.

Shortly after the craft went missing, "the Canadian Mission Control Centre received a ping from an emergency locator transmitter (ELT) approximately 10 nautical miles [18.5 kilometres]east of Revelstoke," hesaid.

Revelstokeis a resort community in the Columbia-Shuswap Regional District, located 400 kilometresnortheast of Vancouver and 289 kilometreswest of Calgary.

While search-and-rescue and military aircraft were charged with finding the missing helicopter, Mohyeddin told CBC News that low visibility in the area was preventing them from operating.

"Currently ground search-and-rescue, the Royal Canadian Mounted Police and the Civil Air Search and Rescue Association [CASARA] are searching the vicinity of that ELT signal by ground," he said Saturday afternoon.

Mohyeddinsaid the CASARA has provideda drone capable of detecting heat signatures that crews will use to continue the search.

The spokesperson added that crews were searching in the vicinity of Highway 1 for the helicopter.