PATNA: Bihar Chief Minister Nitish Kumar's JD(U), a BJP ally, on Tuesday appeared divided on supporting the Citizenship (Amendment) Bill in Parliament, with two top party functionaries calling the legislation "discriminatory and unconstitutional".

Party vice-president Prashant Kishor and general secretary Pavan K Varma voiced disappointment over the JD (U) backing the Bill in the Lok Sabha, and urged Kumar to "reconsider" the stand when the legislation is debated in the Rajya Sabha on Wednesday.

Meanwhile, the BJP expressed gratitude to the alliance partner, which had opposed key legislations like the Triple Talaq bill and the Jammu and Kashmir (Reorganization) Bill in the recent past.

However, the JD (U) came under opposition fire for supporting the CAB in Parliament.

"I urge Shri Nitish Kumar to reconsider support to the #CAB in the Rajya Sabha. The Bill is unconstitutional, discriminatory, and against the unity and harmony of the country, apart from being against the secular principles of the JDU. Gandhiji would have strongly disapproved it," Varma, also the party's national spokesman, tweeted.

He later told NDTV that he might broach the issue with the Bihar chief minister, who is also the national president, though that would remain between him and me.

When asked if the party's stand in the Lok Sabha stemmed from political necessity as the state will have assembly elections next year, Varma said despite being a constituent of the BJP-led NDA the party has taken contrarian stand on several sensitive issues like Article 370 and instant triple talaq.

The CAB, he said, is not in consonance with JD (U)'s constitution, which cannot be held hostage to political concerns.

Noting that Nitish Kumar had walked in and out of the NDA in the past, he pointed out that while the JD (U)-BJP coalition has given a "stable and good" government in Bihar, the two parties were contesting Jharkhand assembly polls separately.

"The party has freedom to formulate its views on issues," he said.

When asked whether he will ask Kumar to shift the party's stand in the Rajya Sabha where the Bill will be tabled on Wednesday, Varma said, "I will be in touch with my leader but that is between me and the party."

Earlier, on Monday night, while the Bill was being put to vote in the Lok Sabha, Kishor had tweeted disappointed to see JDU supporting #CAG that discriminates right of citizenship on the basis of religion. It’s incongruous with the partys constitution that carries the word secular thrice on the very first page and the leadership that is supposedly guided by Gandhian ideals.

Bihar BJP spokesman Nikhil Anand came out with a cryptic tweet on Tuesday, saying some individuals are keen to establish themselves either as an institution or beyond the organizational framework. They also want their leader to follow them and move according to their dictates. The one who can’t shed differences for the sake of one’s country is worthless. #CAB.

In another tweet, in Hindi, he thanked parties which supported the Bill.