CHICO, Calif. — Authorities have taken a 14-year-old boy into custody after police said he attempted to kill a woman on the grounds of Chico High School.

The Chico Police Department said the name of the teenage suspect is not being released due to his age.

Police said that at 6:30 a.m. Friday, custodial staff at Chico High School located a severely injured 71-year-old female on the Warner Street side of Chico High School Campus, on the grounds of the school’s athletic stadium.

The agency said its Patrol Unit, Violence Suppression Unit and crime scene investigators conducted the investigation.

Investigators determined that the victim regularly utilized the campus track for exercise.

Approximately an hour after the conclusion of the Chico High School commencement ceremony, the victim was exercising at the facility grounds, police said.

Authorities said the woman was pursued and attacked from behind by a suspect with a large, bludgeoning weapon.

The teenage suspect fled the area and the incapacitated victim was left on the facility grounds until her discovery the following morning, police said.

Investigators determined the identity of the suspect to be a 14-year-old male.

He was located and arrested for attempted murder at 2:30 p.m. Friday.

Additional details about the case were not immediately available.