Officials from the two parties met on Thursday to hold talks and agreed to assist each other in the upcoming election, in which commune councilors will vote to choose the first-ever district, provincial and municipal councils, Funcinpec Secretary-General Nhiek Bun Chhay was quoted by the Cambodia Daily newspaper as saying.
"We have agreed to unite with each other during the council election on May 17," he told the newspaper.
He added that the two parties uniting to form a single party would make sense because the NRP was originally born out of Funcinpec.
NRP spokesman Suth Dina confirmed that the discussions between the two parties were held and the two parties would cooperate for the May election.
In late 2006, Prince Norodom Ranariddh formed the NRP shortly after being ousted from the presidency of Funcinpec, effectively splitting the royalist vote.