A Virginia TV station is reporting a major investigation in Louisa County into a “sexting ring involving more than 100 teens.”

WRIC, an ABC affiliate, reported that the Louisa County Sheriff’s Office launched the probe after a mother noticed “suspicious activity” on her daughter’s Instagram account.

The station quoted a Louisa County High School sophomore saying: “Some guys made up an Instagram page, and they got naked pictures from all these girls, and they started posting them on the Instagram page.”

The sheriff’s office had the page taken down after finding more than 1,000 pictures and videos of teens, most of which were sexually explicit, the station reported.

According to the sherriff’s office, the oldest person pictured appears to be 17, and the youngest is just 14 years old. Deputies have taken 25 cell phones from teens who may have received or accessed the pictures.