UPDATE: Canadian freestyle skier Sarah Burke dead at 29
The nature of Burke's injuries has not been disclosed.
In a statement released Wednesday by Burke's publicist, a doctor at University of Utah hospital says Burke "sustained serious injuries and remains intubated and sedated in critical condition."
The 29-year-old Burke is widely considered the foremost pioneer for her main sport of freestyle halfpipe. She lobbied aggressively to have it included in the Olympics, where it will debut in 2014.
She is a four-time Winter X Games champion and had been scheduled to defend her 2011 title later this month in Aspen, Colo.
