I must say that this draconian, allegedly autonomous wing of the ISI, has been involved in making and breaking of the governments and political alliances. Specially the musical chair rounds of 90's when we saw 9 civilian and caretaker governments, and the icing on the cake with a military coup.
It is believed to have been operational by the self proclaimed Field Marshal, Gen. Ayub Khan. The questionable use of force by his Governor West Pakistan in forcing a favourable election result against Mohtarma Fatima Jinnah. Gen. Yahya used it against the Bengali public and politicians, It was taken a step further and formally ordered by the late premier Z.A. Bhutto, who had no ear for criticism to force opposition members down. It rose to its peak during the Gen. Zia's dark 11 years. The making of a favourable 'Majlis-e-Shura', an unelected parliament of the Industrialists and Landlords,and to trace the anti-Islamic 'culprits' and punish them( lashed and hanged ) publicly,most of which were the 'leftist' labour and student leaders. Then the breaking of 1988 PPP government and sponsoring the effort to make 'IJI' and election rigging in its favour was confirmed by Gen. Mirza Aslam Baig under Oath. The most recent and popular election muddling by it was in the 2002 elections to help the pro-Musharraf PML-Q secure seats, with the help of Local Governments.
I must mention here that, Ardisher Cowasjee, of one of the senior journalist in Pakistan, has been writing periodically about this wing of ISI's, not to mention that he has taken the toll for doing so (remember the anti-Pakistani, pro-American, unfaithful Zorastrian propoganda ?). A few links from this very writer showing the rubber band nature of this cell: