Two Santa Clara County women, one a student teacher, were arrested Thursday on allegations they had sex with teenage boys earlier this year, according to the Santa Clara County Sheriff’s Office.

Investigators believe there may be more victims tied to the pair, who were sexually involved with boys between 15 and 16 years old, who they knew through family or friends, authorities said.

Talia Sisco, 24, of Saratoga, is being held without bail in the Elmwood women’s jail in Milpitas on multiple counts each of oral copulation of a minor and unlawful sexual intercourse with a minor, contributing to the delinquency of a minor, and arranging a meeting with a minor to commit a sex offense.

A second suspect, 23-year-old San Jose resident Tina Pourani, was arrested and booked counts of unlawful sexual intercourse with a minor and oral copulation of a minor. Pourani was released after posting $60,000 bail.

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Authorities say Sisco and Pourani are best friends dating back to their days at Saratoga High School and first became the target of a criminal investigation April 7. That was around the time detectives reportedly got a tip implicating the two women in “a series of alleged sexual relationships between these suspects and several boys attending a local high school,” according to the Sheriff’s Office.

Over the course of the investigation, detectives spoke to several people linked to the allegations, including the reported victims, and “collected extensive evidence of a graphic sexual nature.” That material included a reference by at least one of the suspects describing themselves with the phrase “sexual deviant,” the Sheriff’s Office said.

Sisco was a student teacher at Bernal Middle School when she came under investigation, but detectives do not believe any of the known victims attended the school. When the Oak Grove School District learned of the investigation it barred Sisco from the school, according to the Sheriff’s Office.

“I am grateful these predators were brought to justice,” Sheriff Laurie Smith said in a statement. “If there are other victims still out there, please come forward.”

The Sheriff’s Office declined to release additional information about the case, citing the ongoing investigation and privacy of the reported victims.

Anyone with information about additional victims or the sexual-assault case can contact detectives at 408-808-4500 or leave an anonymous tip at 408-808-4431.