The Peoples Democratic Party, PDP, has accused President Muhammadu Buhari of planning to be a sole presidential candidate during the 2019 elections.
PDP said for that reason, the All Progressives Congress, APC, was bent on causing trouble in the PDP ahead of 2019.
The National Publicity Secretary of the PDP, Kola Ologbondiyan, told reporters that those who opened an "illegal office" of the party at the Asokoro District of Abuja were being deceived by the ruling party.
The former ruling party however said such plot would fail, adding that its members would not be deceived by the ruling party.
He said, "They are so unsettled that the PDP is progressing and progressing progressively . That is why they are using some people to cause confusion in our party but we have gone beyond that.
"What is more important now is that we are embarking on membership drive to win more members back to the PDP.
"President Buhari wants to be the sole candidate in 2019 ; that's why they (APC) want to cause crisis in our party.
"We are going to stand as a party and we are going to fiercely contest elections in 2019 . Our doors are open to Nigerians and anyone who is interested in contesting an election in 2019 can come in.
"I can assure you that majority of people still hanging around in the APC are coming back home , the PDP. APC is going to the next election as an empty party."
He added, "Recall that after our convention, the APC attempted to inject disagreements and rancour among our members, particularly in the South-West, but also failed."