The Indian military has been mobilised to help contain protests touched off by a hugely controversial bill widely seen as encouraging discrimination against those professing the Islamic faith.
Soldiers will be deployed to the Assam and Tripura states.
This comes just a day after the Indian parliament passed the Citizenship Amendment Bill that now awaits the assent of the prime minister Narendra Modi, the Cable News Network (CNN).
Prime Minister Narendra Modi has hailed the bill as offering vulnerable groups protection.
Those who are against the bill becoming law have said that it undermines the secular Indian constitution, Aljazeera reported.
The prime minister has assured those concerned about the implications of the law, saying that no one's rights will be taken away nor violated.
"I want to assure them -- no one can take away your rights, unique identity and beautiful culture. It will continue to flourish and grow," said Modi as quoted by CNN.
The bill was approved by the upper law by a 125-105 margin.
At the lower house, the controversial bill passed by a margin of 311-80.
"The central government and I are totally committed to constitutionally safeguard the political, linguistic, cultural and land rights of the Assamese people," the PM added in a tweet as quoted by the British Broadcasting Corporation (BBC).