This was contained in a statement by the PDP chairman of Galagamma ward in Gumel, Jigawa, Alhaji Ibrahim Kafinta, made available to the News Agency of Nigeria on Monday in Dutse.
The chairman said the decision to expel Mahmud was taken during a stakeholders meeting held in his ward.
Reports had earlier indicated that Mahmud had dumped the PDP for the All Progressives Congress, which won the March 28 election in the state.
Kafinta did not say when the stakeholders meeting, which ratified the expulsion, held.
The ward chairman alleged that the deputy governor “sabotaged PDP” during the recent National Assembly election.
He added that the Gumel Local Government Area headquarters of the party, had endorsed the expulsion.
Efforts by NAN to get the comments of the deputy governor on the matter was futile as he neither picked a call nor replied a text message sent to him.