Ramping up pressure on the Rashtriya Janata Dal over the corruption case involving Bihar Deputy Chief Minister Tejashwi Yadav, the Janata Dal-United today said Chief Minister Nitish Kumar will never compromise on the issue of corruption.

"Nitish Kumar's stand on corruption is well known. He will never compromise on it," JD-U spokesperson K C Tyagi said.

Asked what his party expected from the Lalu Prasad-led RJD over the charges against his son Tejashwi, he said the RJD leader should give a detailed explanation over these allegations, something his party made clear following a meeting of its leaders in Patna.

Tyagi also insisted that he never sought Congress chief Sonia Gandhi's intervention to defuse the crisis in the grand alliance and only welcomed such an suggestion reportedly made by a Congress leader in Bihar.

Sonia and Congress deputy and her son Rahul Gandhi had spoken to Kumar following his party's announcement of its support to the opposition's vice presidential candidate.

The Congress, which is a partner in the grand alliance' government in Bihar, insisted that the alliance was intact.

Earlier, the JD-U had asked the RJD to come clean on allegations against Tejashwi with facts and not to 'display arrogance' of having 80 MLAs.

"The RJD, which is showing arrogance of 80 MLAs, should no forget that it was reduced to 22 MLAs in 2010 state poll and in the elections in 2015 there number swelled due to the credible face of Nitish Kumar as head of the coalition," state JD-U chief spokesman Sanjay Singh said.

"Be within limits and come clean on accusations (against Tejashwi) at the earliest," Singh said, strongly reacting to the 80-MLA remark of Ram Chandra Purve, the Bihar unit chief of the RJD, and others.

JD-U spokesman Neeraj Kumar, in an apparent referrence to Lalu Prasad and Tejashwi, said those against whom accusations have been levelled should explain the source of their property 'to silence the opposition'.

His colleague Sunil Singh echoed similar views and made it clear that the party would in no case compromise with the 'clean image' of Nitish Kumar, saying the JD-U president and Bihar chief minister is known for his 'politics of principles and zero tolerance to corruption'.

Meanwhile, a section of media reported that Tejashwi has made up his mind to tender resignation and the decision to this effect could be announced after the return of RJD president Lalu Prasad tomorrow from Ranchi where he has gone for appearance in a fodder scam related case.

However, the deputy chief minister in a tweet ridiculed these reports. -- PTI