Hours after Union Minister Arun Jaitley upbraided her in his blog, Chief Minister Mamata Banerjee and her aides took the Centre head on. While party MP Derek O'Brien launched a no-holds-barred attack on the BJP and National Security Adviser Ajit Doval, his chief was riled enough to use unparliamentary language at a meeting of party workers, calling an unnamed BJP leader by a four-letter word.Trinamool Congress has already boycotted Sunday's all-party meeting in Delhi. On Monday, the Chief Minister plans to hit the streets in Kolkata in protest - the second Chief Minister since Arvind Kejriwal to do so in recent times. The day after, her MPs will take on the Centre in Parliament over the repatriation of black money, Foreign Direct Investment in insurance and communal riots.Mr Jaitley's blog had accused the Ms Banerjee of being irresponsible and anti-national in her Saturday's comment - that the BJP had "stage-managed" the Burdwan blasts.On Sunday, Derek O'Brien said the "stage-managed" blasts were "part of the BJP's devious master plan, concerted strategy used even during PM's poll campaign in Bengal".National Security Adviser Ajit Doval, who visited Bengal in the aftermath of the blasts and criticized the state government for being unaware of the mushrooming terror hubs, is a "known RSS sympathiser," he said. "The gameplan has been hatched in the RSS headquarters. All the facts will be made public in 48 hours," Mr O'Brien added.The state BJP, which had dismissed Ms Banerjee's yesterday's attack as a mark of desperation, today said she was miffed by her failure to cut any ice in Delhi last week.State BJP chief Rahul Sinha said: "She had gone with great hopes that the alliance would be formed that day itself. But she did not get on the dais, there was no separate meeting, no one talked to her. Humiliated, the CM left at half time and met the BJP leaders. But our party will not support the corrupt or try to save them."

Ms Banerjee had met three top BJP leaders - Rajnath Singh, Arun Jaitley and LK Advani - during her visit.The Trinamool Congress government has lately found itself in a corner over the ongoing probe in the Saradha scam in which several of its leaders are under the CBI scanner. Parliamentarian Srinjoy Bose has been arrested, minister Shyama Prasad Mukherjee is being questioned and minister Madan Mitra, who has also been summoned for questioning, is currently in hospital.