6 people who were involved have identified as Sagar Sharma, Manoranjan D, Amol Shinde, Neelam Devi, Vishal Sharma and Lalit Jha.
Police sources have reported that the main conspirator in the breach is someone else.
The Delhi Police has registered a case under the stringent anti-terror law Unlawful Activities (Prevention) Act.
At request of Lok Sabha secretariat, an inquiry committee has been set up under CRPF DG.
Police said that all accused were associated with a social media page 'Bhagat Singh Fan Club'.
All accused met in Mysore about one and a half years ago.
Sagar came from Lucknow in July but could not enter the Parliament.
On Dec 10, the accused gathered near India Gate, where coloured crackers were distributed.