Two top Bengal BJP leaders, Sukanta Mujamdar and Suvendu Adhikari mounted sharp attacks on chief minister Mamata Banerjee on Wednesday, the day of the 12-hour state bandh called by the saffron camp.

State BJP president Majumdar went after Mamata on Wednesday for saying that if Bengal burns, so will Assam, North East, Bihar, Jharkhand, Odisha and Delhi.

Majumdar wrote a letter to Union home minister Amit Shah, urging him to take action against the chief minister for her "anti-national" comments.

“This isn't the voice of someone holding a constitutional position; it's the voice of an anti-national. Her statement is a clear attempt to threaten, incite violence and sow hatred among people,” Majumdar wrote.

"As the chief minister of a state within India's constitutional framework, she is saying that if there is an attempt to create unrest in Bengal, Assam will be disturbed, and Manipur will be disturbed. She is talking about creating unrest in the Northeast. Whose language is this? This is the language of Bangladesh's Jamaat (e-Islami),” the BJP state chief said during a news meet on Wednesday afternoon to demand Mamata's resignation.

His letter and comment referred to a part of Mamata's address at the Trinamool Congress Chhatra Parishad foundation day on Wednesday.

“Is Modi babu (Prime Minister Narendra Modi) trying to set Bengal on fire?” she said.

“Some people are thinking this is Bangladesh. People should remember that Bengal and Bangladesh are different. They want to incite riots over here but I want to remind them that if they do this, then it won't stop with it.... Remember, if Bengal burns, then Assam, North East, Bihar, Jharkhand, Odisha, and Delhi will also burn. It will spread like wildfire across the country. We will rock the very chair they occupy,” she said.

Mamata's remarks came in the wake of the events in Bangladesh where a student movement led to the fall of the Sheikh Hasina government. Controversially, there have been efforts from different political quarters to equate the Bangladesh student movement with that of protest by doctors and students over the RG Kar rape and murder.

BJP leader Suvendu Adhikari, also the leader of the Opposition, said Wednesday's "successful bandh" was the first step to ensure Mamata's resignation.

Speaking to reporters in his constituency Nandigram, Adhikari said: “Just wait and watch. We will march to three places, Nabanna (the state secretariat), Kalighat (the CM's residence) and Lalbazar (Kolkata police headquarters) on the same day. You will come to know... the date of the movement soon. The chief minister will have to resign."

Adhikari's announcement came after the police on Wednesday allegedly came down heavily on BJP supporters supporting the bandh at Reyapara in Nandigram.

Asked about it, Majumdar said: “We've had primary talks but it has not been finalised yet. We are a disciplined party and will make the announcement after it is discussed and approved by the party.”