North Carolina ? Two students horsing around in a college dormitory crashed through a third-floor window early Friday and fell onto the concrete below, school officials said. One was killed, and the other was in fair condition overnight.

Investigators do not believe drugs or alcohol were involved, University of North Carolina spokeswoman Lisa Katz said.

The two young men were “just running, horsing around, playing,” and went through a window at the end of a hallway, she said. Officials said the window had double-pane security glass with wire mesh. Its ledge was about 2 1/2 feet above the floor.

Keith Shawn Smith, a 20-year-old sophomore from Greensboro, died at a hospital. Tyler Joseph Ely Downey, a 19-year-old freshman from Asheville, was injured.

Details of their injuries were not released.