Singh had earlier also spoken to RJD chief Lalu Prasad. Both LJP and RJD have been praising Congress and making it clear that they want the ruling party to be an integral part of the "secular alliance" in Bihar, having 40 parliamentary seats.
Sources in Congress said that under the formula being discussed for the pre-poll tie up, RJD could contest on 20 Lok Sabha seats, Congress ten, LJP eight and NCP two.
Hard bargaining is expected in coming days before an alliance is finally stitched for the crucial Hindi state. RJD has fought on 28 Lok Sabha seats in the last polls, including the three which it had earlier proposed to give to Congress.
Paswan whose party had contested the last Lok Sabha polls in alliance with RJD minus Congress was dropping broad indications of his party warming up to Lalu Prasad's arch rival JD (U).
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Paswan has however maintained all this time that while its tie up with Congress is final, a decision to include Lalu Prasad's RJD and JD(U) is something on which Congress has to take a call.
He had also made it clear that there are two views in his party on the issue of alliance in Bihar with one section favouring to go with RJD while the other wanting an alliance with JD(U).
He was apparently referring to senior RJD leader Raghuvansh Prasad Singh's remark asking the LJP to declare its candidates and suggesting it to focus on winning more seats rather than contesting more seats.