A UA student was in critical condition last night after being hit by a car driven by another UA student yesterday afternoon.

Sharlene M. Willingham, a family studies and human development senior, was crossing North Campbell Avenue, between East Second Street and East Third Street, when she was struck by a 1996 Audi driven by 23-year-old Benjamin Reesing, a UA student and McKale Center employee.

Willingham, 47, was taken to University Medical Center at 12:30 p.m. after she was hit, said Carlos Valdez, Tucson Police Department spokesman.

Willingham, who is also an employee at Steward Observatory, remained in critical condition last night, said Judy Thurston, UMC public information officer.

Valdez said Reesing was not cited for anything and the investigation is continuing.

Valdez said Willingham was not crossing the street in a crosswalk.

"The investigation showed that she stepped in front of traffic for whatever reason. We don't know if it was inattention or what. We just don't know," Valdez said.

Sgt. Eugene Mejia, University of Arizona Police Department spokesman, said UAPD officers were the first on the scene and assisted TPD officers when they arrived.

Mejia said although the accident was within UAPD patrol boundaries, TPD has responsibility for the main thoroughfares in Tucson, including North Campbell Avenue.