BOONE, Iowa (AP) – Authorities in central Iowa say they’ve uncovered a massive collection of photographs and videos showing nude female juveniles, and they believe they were amassed over several years by high school students. The state Division of Criminal Investigation said Tuesday that a system of storage accounts was discovered after a male juvenile was accused in August of trying to extort sexual photographs and sexual acts from a female juvenile. The male faces an extortion charge.

Authorities said online-based storage accounts with nude photographs and videos had been under the control of numerous current and former high school students in the Boone area. The accounts have been secured. Authorities are working to identify the individuals in the photographs and videos. They called it an active investigation, and additional charges are possible.