A female student was hospitalized after a sledding accident on Libe Slope Sunday and remained in serious condition at a trauma center in Syracuse as of Monday night, according to Cornell Police Chief Kathy Zoner.

Zoner said the student suffered “very, very serious injuries” and had to undergo surgery at the trauma center. Emergency radio reports at the time of the accident indicated that she may have lost consciousness.

Although the exact sequence of events has not been released, the student appeared to have hit a tree while sledding down the Slope, said Blaine Friedlander, assistant director of Cornell press relations. The 911 call was placed around 5:40 p.m.

Zoner added that although sledding on Libe Slope is prohibited, CUPD responds to at least one call of a serious sledding injury a year.

She said that in previous years CUPD had placed signs on the Slope to tell students not to sled but that the signs have since been removed.

“Sledding is prohibited on the Slope, and a lot of it is because of the dangers of injury,” Zoner said. “When they have an injury it can be very severe and very life-threatening.”

Michael Linhorst contributed reporting to this story.