TUCSON, Ariz. — An Oregon cheerleader was carted off the field and taken to a hospital after being hit in the head by a water bottle at the end of Oregon’s 44-41 double-overtime over Arizona on Saturday night.

Oregon officials identified the cheerleader as Katelynn Johnson, a senior. There was no immediate word on her condition or whether she had lost consciousness.

Oregon athletic director Mike Bellotti told The Associated Press that Johnson had been hit with a full water bottle.

Witnesses said Johnson was hit near the entrance to the Oregon locker room in the southwest corner of Arizona Stadium, where the Ducks and their personnel were celebrating a dramatic victory that kept them in control of the Pac-10 title race. Technicians tended to Johnson for several minutes on the field before she was taken away.

“”There were many things — water and other things — being thrown down there,”” Bellotti said.

Arizona officials could not immediately be reached for comment.

“”That’s just unacceptable behavior from fans, whether it was an Arizona fan or any fan across the nation,”” said Oregon quarterback Jeremiah Masoli, who scored the winning touchdown in overtime.

Copyright 2009 by The Associated Press