New Delhi: Janata Dal (United) launched scathing criticism at Bengal under Mamata Banerjee on Tuesday. The party said that Bengal under Mamata Banerjee is turning into a "mini Pakistan" from where Biharis are being driven out by "Rohingyas".

This criticism came shortly after Mamata Banerjee lauded her Bihar counterpart Nitish Kumar for deciding to contest assembly polls in four states separately.

"What is happening in West Bengal is a matter of grave concern. I have been saying this for long. I do not understand why she has thanked and commended our chief minister.

"May be she is happy that the JD(U) is contesting elections in four states on its own, not as a part of the NDA," JD(U) spokesman Ajay Alok told a news channel here.

"But this gesture does not absolve her of her mistakes. She must act to prevent her state from degenerating into a mini-Pakistan," said the JD(U) spokesperson.

"Her thanksgiving cannot make us forget that Biharis are being assaulted in West Bengal and forced to leave the state," he added.

The JD(U), headed by Bihar chief minister Kumar as its national president, resolved Sunday to contest the assembly polls in Delhi, Jharkhand, Jammu and Kashmir and Haryana as part of its efforts to gain the status of a national party.

Banerjee, who is bitterly opposed to the BJP which has made deep inroads in West Bengal, was later quoted by the media as having said, "I have come across a statement from Nitishji that he will not form alliance with the NDA outside Bihar. I would like to congratulate him. Thank you to him".

"Mamata didi should remember that Biharis are being driven out of her state under her watch. And the ones forcing our people to flee her state are not Bengalis. They are Rohingyas," Alok said without elaborating.

A group of BJP supporters in West Bengal were recently rebuked publicly by Banerjee when they chanted "Jai Shri Ram" as her cavalcade drove past them.

Also read: Mamata asks cops to arrest people chanting 'Jai Shri Ram'

Media reports said Chief Minister Banerjee had accused them of being "outsiders".

The JD(U) leader's comment drew sharp reaction from the Bihar's opposition RJD, which has been sympathetic to Banerjee.

"It is obscene. We have been saying for the past couple of years that the ruling dispensation at the Centre is desperately creating a pre-partition situation in Bengal," said RJD's Rajya Sabha member and national spokesman Manoj Jha.

"The baseless and denigrating statement from the JD(U) leader simply blurs the distinction between reality and prejudice," he added.

(With Inputs from PTI)