A 17-year-old girl died a day after officials say she was struck by a bicycle another student was riding on the track of a northern Indiana high school.

Evelyn E. Bolen was attending a physical education class Tuesday at Tippecanoe Valley High School when she was struck and knocked over by a male student who was riding the gym teacher's bicycle, Superintendent Brett Boggs said.

Bolen was walking across the track with a small group of students when she was hit, he said.

"For some unexplained reason the kid got on the bike and ended up running into this young lady," Boggs said. "He didn't mean to hit her. It was an accident."

He said the male student was upset by the accident at the school about 45 miles south of South Bend.

School employees administered CPR until an ambulance arrived to take Bolen to Kosciusko Community Hospital in Warsaw. She was taken by helicopter to Lutheran Hospital in Fort Wayne, where she died Wednesday night.

Dick Alfeld, chief investigators for the Allen County coroner's office, said Friday he could not immediately release the cause of death.

Boggs informed students of Bolen's death Thursday morning and said she was a popular student.

"She's been a Tippecanoe Valley student all along," Boggs said. "She's got a lot of friends and everybody knew her."