"Three indigenous political parties have formed the forum to safeguard and protect the interests of the tribals in the state who form one third of the population.
"We are of the clear opinion that the bill is detrimental to the interest of indigenous people. So, we have formed this forum," its convener Mebar Kumar Debbarmaa said.
The parties who have formed the forum are Indigenous People's Front of Tripura (IPFT), National Council of Tripura (NCT) and Indigenous Nationalist Party of Tripura (INPT).
"States like Assam and Tripura are facing trouble due to infiltration by foreign nationals. If the bill is passed in the Lok Sabha, lakhs of foreign people will get citizenship status which would be a serious threat to indigenous people.
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"Moreover, it is an anti-secular stand of BJP," Jagadish Debbarma, General Secretary of INPT, who is also the joint convener of the forum said in the press conference.
The Tribal council area constitute two third of the state territory.