The Trinamool Congress members in the Rajya Sabha today walked out protesting against Deputy Chairman's ruling not allowing the matter raised by Derek O'Brien who alleged that his party MPs are being threatened by the BJP leaders. <br/><br/>Raising the matter during Zero Hour, the TMC MP also displayed some newspaper reports. Deputy Chairman Prof. P J Kurien observed that the member did not give notice to raise the matter. The agitating TMC members staged a walk out.