Massachusetts authorities are investigating after photos of nude Duxbury High School girls were posted online.
School staff notified police on Wednesday that inappropriate photos of female students were uploaded to a Dropbox page.
Investigators have since been able to shut down the page.
Police and school officials are also notifying the parents of the girls involved.
Now, investigators are looking for the person or people who may be behind the photo sharing.
"There are some young people here who are very embarrassed and very upset. They are victims," said Duxbury Police Chief Matthew Clancy. "They made a mistake and someone took advantage of that."
Clancy added that his department would work with schools to help prevent similar incidents in the future.
The latest news from around the state
"We will join the Schools as needed and requested in educating students on the negative impacts of this activity," he said.
Dr. Ben Tantillo, the district's superintendent, said in a statement that officials learned of the Dropbox from a student at the school.
"These lists had files that were supposed to be pictures of our female students in a variety of undress," Tantillo said. "The Duxbury Police are investigating this issue and have been interviewing the students whose names appear on the list with their parents."
Tantillo added that police were working with Dropbox to find the file's creator.
"This issue is now in the hands of the police who will communicate their findings to the school district once their investigation is complete."