Explicit images initially believed to have been sent through Snapchat were reportedly put online, with threats from hackers to upload more. But according to Snapchat, users who had been accessing the service via a third-party app, and not the official Snapchat app, had their images intercepted.
Snapchat responded to reports, Snapchat blamed unauthorized third-party apps for the security breach.
"We vigilantly monitor the App Store and Google Play for illegal third-party apps and have succeeded in getting many of these removed."
Snapchat is a messaging app that allows the sharing of videos and images that "disappear" after a short period of time, usually just a few seconds.
The "leaked" images were uploaded to the internet with a download link shared on a message board on Thursday night, according to reports.