Jordan and Evan Caldwell, who were both 17, had reportedly entered the facility, which was used for the 1988 Winter Olympics, and attempted to descend the course using their own sled.

Police and medical crews were called at about 1.30am on Saturday and also found six other teenage males with injuries.

“It’s believed at least eight teenagers, all males, entered the property after hours and used a personal sled or toboggan in an attempt to go down the bobsled track,” said Staff Sgt. Paul Wyatt.

"Part way down, the group hit a large gate used to separate the bobsled and luge tracks."

Wyatt said the survivors were "severely traumatised" after the tragedy.

The site in the Canadian city is operated by WinSport, whose CEO Barry Heck said he hadn't heard of people breaking into the Park and using the sliding track before.

"I want to start by offering my thoughts and prayers to the family of the two young men who have passed away," he said.

"Today is the most tragic day in WinSport's history."

The family of Jordan and Evan described them as "bright lights" to all who knew them.

“We were reminded today that life is but a vapour," said a statement.

"Life is precious, life is fragile, and we must redeem the time we’re given.

"Our brief 17 years with them were a gift: filled with much love, laughter, and fond memories.

“They leave a huge void and will be sorely missed.”

Melissa Lowe, a Canadian bobsleigh pilot, tweeted: "The track at COP is my home away from home and where my love affair with bobsleigh started.

"Beyond devastated about the news this morning."