The police sealed off the secretariat on Saturday.
The police on Saturday sealed off the secretariat of the rival faction of the Peoples Democratic Party, PDP, headed by Abubakar Baraje.
The faction has the support of seven state governors and former Vice President Atiku Abubakar.
The office is off Panama Street, Maitama, Abuja.
Efforts to speak to police spokesman, Frank Mba, on the reason for the closure are yet to be successful as he did not pick calls to his phone.