KOLKATA: A massive controversy has erupted in election-bound West Bengal , with a news website publishing video footages that showed at least a dozen senior leaders of the ruling Trinamool Congress , including ministers and MPs, purportedly accepting money to settle some "business issues".The footages, which the website said were shot before the 2014 Lok Sabha elections, were released on Monday when the full bench of the Election Commission was present in Kolkata. The opposition grabbed the opportunity to attack the ruling party.The BJP demanded immediate resignation of chief minister Mamata Banerjee and sought an investigation by the Election Commission and CBI, while the CPI-M said the election should be postponed and President’s rule imposed in the state. The TMC rejected the allegation, terming the tape "doctored" and part of a conspiracy against the party. The video footages of the ‘ sting operation’, conducted by Narada News, featured TMC leaders including party vice-president Mukul Roy; MPs Sougata Roy, Sultan Ahmed , Prasun Banerjee, Kakali Ghosh Dastidar and Suvendu Adhikari; ministers Subrata Mukherjee and Firhad Hakim; and Madan Mitra who is now in jail. The tape, which has not been verified by ET, showed also a senior IPS officer collecting money allegedly on behalf of a TMC leader."A thief ’s mother shouts the loudest," chief minister Mamata Banerjee said in a public meeting in North Bengal, rejecting the allegation. "The opposition parties, the BJP, CPM and Congress, are now playing dirty games and conspiring against us. But it would not fetch any result. You will get a big zero. If you want to fight, then fight politically." Denying the allegation, Mukul Roy said legal steps would be taken against the organization that made the video.Party spokesman Derek O’Brien issued a press statement, dismissing the tape as "doctored". "We have watched the video of the socalled ‘sting’ operation. There is no sting in it," he said. "The timing of the dirty tricks video, too, clearly indicates the devious motive behind it. Why was the organization who supposedly shot this video hiding the so-called ‘truth’ for more than two years and releasing it today," he said, adding, "We live in an age where technology is often abused."Launching a scathing attack on the TMC, senior BJP leader Siddharth Nath Singh said: "This is the actual face of the TMC. We demand that Mamata Banerjee immediately resign even before her term ends. We are requesting the Election Commission to order an investigation into it. We will lodge a complaint in this regard. Moreover, CBI too should probe into it."Opposition leader and CPI-M state secretary Surjya Kanta Mishra demanded arrests of those who were seen receiving money. Mishra said his party will lodge a complaint with the Election Commission asking it to postpone Bengal polls."Trinamool Congress leaders and ministers are looting thousands of crores of rupees. Its ministers, MPs and MLAs are involved in accepting bribes … We demand a complete probe into this. If necessary, President's rule can be imposed in Bengal by postponing elections."