The rare action has been taken by Chatterjee anguished over repeated disruptions in the House and the immediate provocation was the incidents of April 24 which saw opposition members storming the well shouting slogans without paying heed to the Chair.

Protest in the House that day was prompted by the NDA agitation against price rise which found its echo in both Lok Sabha and Rajya Sabha after the opposition members formed a human chain outside Parliament complex to denounce government's failure to check price spiral.

Members whose cases have been referred to the Privileges Committee for "examination, investigation and report" include several BJP members Shahnawaz Hussain, P S Gadhavi, M A Kharabela Swain, Kishan Singh Sangwan and Kiran Maheswari.

The list also include Chandrakant Khaire, Kalpana Ramesh Narhire (both Shiv Sena), Rattan Singh Ajnala and Sukhdeo Singh Libra (both SAD) as also Tathagatha Satpathy (BJD) and Brajesh Pathak (BSP).

The Speaker referred the matter to the Privileges Committee on Wednesday which had also witnessed some noisy scenes over during the Zero Hour prompting Chatterjee to observe that it has turned into a "torture hour".