He said the election would be held in the 1,354 polling units across the six local government areas that make up the senatorial district.
Mr Haruna said that the incident under investigation related to the retrieval of a specific voter record.
The appointment followed the resignation of the former national chairman, Ajuji Ahmed.
However, the event held at a private apartment in Abuja.
The Turaki-led party faction accused Mr Wike of intimidation.
“Let me warn again that any further attempt to interfere in the affairs of the party by the presidency, INEC and judiciary will be fiercely resisted,” said Mr Abubakar.
He described the PDP as the only formidable opposition to the ruling All Progressives Congress (APC) in the 2027 general elections.
He said the results were fraudulent and concocted.
The Zamfara chapter of the African Democratic Congress has declared former Vice-President Atiku Abubakar as the winner of its presidential primary election in the state.
The returning officer said a total of 69,434 votes were cast during the primary.
