NSF (The National Students Federation) a small nationalist and right-wing group which had been propped up by the help of Karachi University Vice Chancellor to counter DSF's activities, was invaded practically overnight by the now-banned DSF party members, who were still outside. The former DSF members had enough muscle and organisational skills to take over the control of NSF in 1956, thus its new "left" leaning profile emerged. Due to its links with communist movement, DSF was infested with the presence of double agents/informers from the secret service.