New Delhi: The Indian Union Muslim League (IUML) today filed a writ petition against the Citizenship Amendment Bill 2019, which was passed by the Parliament on Wednesday, in the Supreme Court.

Four petitioners including Lok Sabha MPs Kunhalikutty PK, Navas Kani, ET Mohammed Basheer and Rajya Sabha MP Abdul Wahab of IUML will also speak to media after filing the plea.

IUML national general secretary PK Kunhalikutty, on Thursday, termed the  Bill,  as unconstitutional and said that his party will file a petition today in the Supreme Court against the Bill which was passed by Parliament.

"This bill is unconstitutional. That's why our party is filing a petition today. The bill is totally against the fundamental principles of the Constitution, which says equality to everybody and this bill discriminates people on the basis of religion. No party, even if they have a majority in Parliament can take any decision against the basic principles of the Constitution," Kunhalikutty was quoted as saying by news agency ANI.

"We have heard that Congress will also file the petition (against the CAB). They have to decide on that," he said.

The Jamiat Ulema-e-Hind also said on Wednesday, said it will challenge the legislation in the Supreme Court.

Asserting that the Citizenship (Amendment) Bill is against the basic structure of the Constitution, the Jamiat Ulema-e-Hind on Wednesday said it will challenge the legislation in the Supreme Court.

Its reaction came minutes after the Rajya Sabha passed the Citizenship (Amendment) Bill, 2019. The Bill was passed by Lok Sabha, on Monday.

Terming the passing of the Bill in Rajya Sabha and Lok Sabha a "tragedy", Jamiat-Ulema-e-Hind president Maulana Arshad Madani said the Bill is against the basic structure of the Indian Constitution and the Jamiat will challenge it in the apex court.

Madani said that the effects of this Bill may not be visible now, but when the NRC is conducted all over the country, the legislation will hurt millions of Muslims badly.

"This is not a Hindu-Muslim matter at all, it is a matter of fundamental rights of human being and citizens," he asserted.

Meanwhile, opposition parties and locals in northeastern states are staging protest against the passage of the CAB.

Indefinite curfew has been imposed in few districts of Assam in the wake of protests after the passage of the CAB in Rajya Sabha.

The CAB smoothly sailed through Parliament after the Rajya Sabha passed it on Wednesday. As many as 125 members of the Upper House voted in favour of the Bill while 105 MPs voted against the Bill, which was passed by Lok Sabha earlier this week.

The Bill seeks to grant Indian citizenship to refugees from Hindu, Christian, Sikh, Buddhist and Zoroastrian communities fleeing religious persecution from Pakistan, Afghanistan, and Bangladesh and who entered India on or before December 31, 2014.