CULPEPER COUNTY, Va. (CBS19 NEWS) -- Three people, including two juveniles, were charged on Friday after an overdose at a high school in Culpeper County.

According to the Culpeper County Sheriff’s Office, deputies responded to reports of an overdose at Eastern View High School around 9:30 a.m.

The school resource officer called for an ambulance to assist an unconscious 17-year-old girl. School staff members administered Narcan to the girl and then started CPR.

By the time the ambulance arrived, the girl was conscious. She was taken to an area hospital for further treatment.

An investigation was assisted by the Virginia State Police and the Fauquier County Sheriff’s Office.

Investigators learned that two female students have used fentanyl, which they got in the form of counterfeit Percocet pills.

Deputies arrested 18-year-old Jerry Montiel-Sanchez, a student at Culpeper County High School, for the distribution of a Schedule I or II controlled substance.

He is being held at the Culpeper County Jail pending a hearing on Wednesday.

Two female students, a 16-year-old and a 17-year-old, were also charged with the distribution of a schedule I or II controlled substance. Both were returned to their parents.

The Culpeper County Sheriff’s Office says this is an ongoing investigation and more arrests are expected.

Anyone with information about this matter is asked to contact the Criminal Investigation Division at (540) 727-7520.