SFI, which had been on the backfoot after the violent incidents in University College, hit back on Tuesday alleging foul play in the recovery of answer sheets from the college union office.

Addressing a news conference, SFI state secretary Sachin Dev demanded a probe into the recovery of answer sheets a day after the violent incidents in the campus He said SFI has done everything 'humanly possible' the organisational level after the violent incident in the campus.

However, SFI landed in further embarrassment after an audio clip purportedly of union leaders of Government Arts College emerged in social media.

In the audio clip, the SFI leaders were heard using foul language and also threatening girl students after they failed to turn up for an event to promote the CPM's women's wall campaign. The audio clip was widely circulated by rival student organisations as proof of SFI's autocratic way of functioning in other campuses as well.