As the NRC debated rages on, TMC will today be observing black day to express their opposition against the Assam NRC. Trinamool congress has also filed two firs against Assam Chief Minister Sarbananda Sonowal for illegal detention of TMC delegates at Silchar airport. The congress will also hold a congress working committee meet today to chalk out the strategy on the NRC debate. The centre on the other hand has given multiple assurances to the opposition that the draft is not final and NRC is being done under Supreme Court’s supervision.