The Congress on Tuesday accused the BJP of distorting the process of Assam's National Register of Citizens (NRC) for political gains and lashed out at Amit Shah for deliberately giving a "mischievous twist" to the issue by branding any questions on the exercise as support for illegal Bangladesh immigrants.
India says the process is to root out hordes of illegal Bangladeshi migrants.
Numerous state's Bengali community have lived in India for decades, crossing the border into Assam during the bloody Bangladesh (formerly East Pakistan) independence struggle in 1971.
Soldiers stood guard at government offices, where thousands of people queued to check their names on the so-called National Register of Citizens (NRC), Reuters witnesses said.
The draft list, which was released on Monday, has left out almost 40 lakh people in Assam, incorporating names of 2.89 crore people out of 3.29 crore applicants.
Many residents of Assam have long protested against the presence of "foreigners", which include both Hindus and Muslims. Numerous refugees settled in Assam, a state which now has more than 30 million people. It is feared by many including United Nations human rights experts that a significant number of Bangla-speaking Indian Muslims along with some Hindus will not be included in the NRC.
While Modi and his BJP government plan to remove those they deem "foreigners" from Assam state, local officials are assuring those recently designated as foreigners will not be immediately deported.
"The over 40 lakh people, who have been kept out of the NRC, are infiltrators".
About 29 million people have been found eligible for inclusion in the citizenship document from around 33 million applicants, he said. Till August 7, the draft NRC is being made available to the people to see whether their names are there or not, he added.
The Assam Accord, which was signed between the government and the protesters, was able to bring a consensus on the eligibility criteria for citizenship.
Accusing the Centre of trying to forcibly evict 40 lakh people, she said, "It is a matter of grave concern".
"The government is stigmatizing a group of people".
Sailesh did not provide a breakup of people who had failed to make to the draft list.
Some TMC members were heard saying that their party has given notice for adjournment over the issue but Naidu rejected the claim, saying that he has not received any notice. The exercise to update the NRC was stopped for some time for various reasons and, later, revived in 2015 under the directive of the Supreme Court.