They raised slogans against party leaders Maula Bux Chandio, Ms Shagufta Jumani, Amjad Baloch and Naeem Jarwar.
The protesters told newsmen that in the party elections held in Hyderabad on July 28, these leaders had changed the results in favour of their blue-eyed candidates.
They warned the party leadership that the workers of Hyderabad would not accept the results of rigged elections.
They claimed that according to the true results Mehboob Sangi had been elected as information secretary while Shaman Ali Khoso had been elected as finance secretary but the above leaders had stolen the ballot papers to get their own favourites elected.
They also threatened to go to the courts to get justice.
They appealed to the party chairperson, Ms Benazir Bhutto, and the central leadership of the party, Makhdoom Mohammed Amin Faheem, Aftab Shaban Mirani, Prof N. D. Khan, Nisar Ahmed Khuhro, Qazi Asad Abid, and the city organization of the party to take serious notice of the rigging in the party elections of Hyderabad city and restore justice.