A day after BJP chief Amit Shah targeted Trinamool Congress in Kolkata, Mamata Banerjee's party on Monday hit back alleging that his name was mentioned in a 'red diary' purportedly seized by CBI from Sahara group's Subrata Roy\u00a0office but the government dismissed the charge as speculation. In Rajya Sabha, Trinamool MP Derek O'Brien tried to raise the issue of the alleged 'red diary' of Sahara and party members staged a walkout when they were not allowed to speak out of turn. Outside Parliament, Trinamool MPs staged a protest waving red placards with Sahara written on them and demanded a clarification from Prime Minister Narendra Modi on the issue. TMC leader Sudeep Bandhopadhyay told reporters that the BJP chief's name was mentioned in a 'red diary' allegedly recovered by the Central Bureau of Investigation during searches at Sahara's office in November. \u201cWe want to know why they are being secretive about the names.. Why is CBI not revealing the names? We will not let it go. We want a discussion on the issue,\u201d he said. \u201cOn 22nd November 2014, in a raid at CBI office, a red diary was recovered. In that red diary, I have information that national president of BJP Amit Shah's name is present along with one Mr NM. Whose names are these? CBI is not revealing this. action has not been taken. \u201cI hope the government will clarify the issue,\u201d he said. Union minister of state for home Kiren Rijiju rejected the charges, saying these were false speculations and \u201cpolitical in nature\u201d. \u201cThese all are false speculations,\u201d the minister said outside Parliament House.