A PP meeting of the party held at Singha Durbar decided to this effect.
RPP-N has 25 lawmakers.
Writing in social media site twitter, RPP-N Assistant spokesperson Mohan Shrestha confirmed that all the 25 lawmakers of the party are upbeat about voting for KP Sharma Oli as new PM.
A election is slated to be held to elect new prime minister at the parliament today.
Chair Oli's three pillars in UML
Nepali Congress President and Prime Minister Sushil Koirala and UML Chairman KP Sharma Oli had filed their nominations at the Parliament for new prime minister.