STEVENS POINT, Wis. (AP) -- Police say a 20-year-old University of Wisconsin-Stevens Point student who fell about 35 feet from the roof of a downtown building had gone there with others to smoke cigarettes during a party.

Sgt. Greg Bean said Monday that alcohol was involved in the accident that critically injured Kayla Wilke of Sturgeon Bay. She remains in a Marshfield hospital.

Bean says Wilke was attending a party early Friday morning at one of the upstairs apartments in the building. He says someone kicked open a locked door to a stairway to the flat roof and about five people went there to smoke instead of walking downstairs to smoke on the ground.

Bean says an eyewitness told investigators that Wilke sat on a ledge, apparently lost her balance and fell, either backward or off to one side.