Members of the party were redirected to the Government House where Governor Nyesom Wike presided over a meeting where the decision to cancel the convention was reached.
The event has been the centre of controversy due to conflicting judgments from courts in Abuja and Rivers, one halting it and the other permitting it to hold.
The PDP was expected to elect members of its National Executive Council (NEC) at the convention, but instead the party extended the tenure of its Caretaker Committee, led by Senator Ahmed Makarfi, by one year.
Meanwhile, the PDP has accused security officials of attacking Wike’s convoy in a bid to prevent him from attending the convention.
The police have however defended the sealing off of the venue saying that the force has the duty of protecting lives and property in the face of threats to peace and stability.