Mumbai Cyber police registered an FIR against developers of `Bulli Bai` app and Twitter handles that promoted this application, an official said after photographs of at least 100 influential Muslim women were uploaded for auction on the app triggering widespread outrage.

The case was registered on January 1 under sections 354-D (stalking of women), 500 (Punishment for defamation) and other sections of the Information Technology Act, he said. "The West region of Cyber Police registered the FIR against Twitter handle holders and the `Bulli Bai` app developers hosted on GitHub," the official said.