The Delhi Police has also initiated a probe in the matter, a senior officer said.
The women's panel said it has issued notice to Instagram and Delhi Police in the matter of the online group named 'bois locker room' which was being used by some persons to share objectionable pictures of minor girls and discuss illegal acts including rape.
"We have not received any complaint yet in this regard. But taking sou moto cognisance of the matter, we are registering a case under relevant sections of IPC and IT Act for obscenity," said Anyesh Roy, Deputy Commissioner of Police (Cyber Cell).
The Cyber Cell unit of Delhi Police has also written to Instagram to share details of the group's members and admin and is awaiting their response in this regard, he said, adding that an investigation is underway.