A Kansas University student was in critical condition Monday night after falling from a second-story roof early Sunday in the Oread neighborhood, authorities said.

Police didn’t release the woman’s name, but said she was a McCollum Hall resident who was at a friend’s house at 1045 Tenn. University of Kansas Hospital officials confirmed that the student, Sara Anne Driessel, 18, of Lenexa, was in critical condition at the Kansas City, Kan., hospital.

About 3:40 a.m. Sunday, Driessel went out onto the flat roof to smoke, said Lawrence Police spokesman Dan Ward.

Someone inside the house heard a crashing sound, went outside and found that Driessel had fallen to the lawn below, Ward said.

Police and Lawrence-Douglas County Fire & Medical personnel were called and found Driessel unconscious, Ward said. She was taken by air ambulance to Kansas City. A helicopter landed in the parking lot by KU’s Memorial Stadium to pick her up, emergency officials said.

“It’s obviously a very tragic situation, especially for the family members,” Ward said.

He would not say whether alcohol was a factor in the mishap.

Two men who were at the house Monday afternoon declined to comment about what happened.

According to Douglas County property records, the house is owned by David K. and Misti L. Jones of Lake Quivira. Neighbors said it was occupied by their son, Kyle Jones, a KU student. The Joneses didn’t return a phone message left for them Monday night.

Sara Anne Driessel, a Lenexa freshman, was injured after falling early Sunday from the second-story rear roof of this home at 1045 Tenn. Driessel was in critical condition Monday night at the University of Kansas Hospital.

Police filed a report, but they are not investigating the incident because they don’t think a crime was committed. No citations were issued.

“At this point it just looks like a tragic medical emergency,” Ward said.

There is no railing around the roof area from which Driessel fell. A second-story door opens onto it.

In general, Lawrence city code requires that a railing be in place for any porch or balcony that is 30 inches or more off the ground, said code enforcement manager Barry Walthall. He said his office usually didn’t make a check at a house unless there was a complaint made to the city; he was unaware of any complaint concerning 1045 Tenn.

Staff writers Eric Weslander and Terry Rombeck and 6News anchor/reporter Janet Reid contributed to this report.

6News video: Student falls from roof of house