Upendra Kushwaha's RLSP lost all five Lok Sabha seats it contested with RJD. (PTI)

After drawing a blank in the Lok Sabha elections, former Union minister Upendra Kushwaha's Rashtriya Lok Samata Party got yet another setback on Sunday as all three of its members in the bicameral legislature joined Chief Minister Nitish Kumar's Janata Dal (United)

Confirming the development, Assembly Speaker Vijay Kumar Chaudhary and legislative council deputy chairman Haroon Rashid said letters to this effect have been forwarded by two RLSP legislators--Lalan Paswan and Sudhanshu Shekhar-- and MLC Sanjiv Singh Shyam on Friday.

"The legislators had also appended letters of approval from the JD(U). They were asked to appear in person for some formalities after which they shall be treated as JD(U) legislators," they told news agency PTI.

Notably, the RLSP legislators had earlier revolted against Mr Kushwaha''s decision to snap ties with the NDA and join the Mahagathbandhan.

They announced that they would remain with the ruling coalition and seek recognition from the Election Commission as the "real Rashtriya Lok Samata Party".

NDA's stupendous victory in the Lok Sabha elections appears to have made the dissident RLSP legislators realise that it was safer to join the chief minister's party, which contested 17 seats and won 16, rather than seeking recognition as a separate group.

Kushwaha was with the JD(U) till 2013. He went on to form his own party which aligned with the NDA and won all three seats it had contested in the 2014 Lok Sabha polls, riding the Modi wave.

In the just-concluded Lok Sabha polls, the RLSP contested five seats in alliance with the RJD, the Congress and two other small outfits. The party lost all five seats to its rivals, including Karakat and Ujiyarpur, from where Mr Kushwaha himself had contested.