JNU Students' Union President Kanhaiya Kumar, Umar Khalid and Anirban Bhattacharya along with other students started the hunger strike at night and said they reject the findings and recommendations of the high-level inquiry committee that probed theincident.
Kanhaiya, Umar and Anirban Bhattachayra were arrested on the charge of sedition in February in connection with an event on campus against hanging of Parliament attack convict Afzal Guru during which anti-national slogans were allegedly raised. They are out on bail now.
The students took out a march late night from Ganga Dhaba to administration block against the action.
While Kanhaiya has been slapped with a penalty of Rs 10,000 on grounds of "indiscipline and misconduct", Umar, Anirban and Kashmiri student Mujeeb Gatoo have been rusticated for varied durations.
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ABVP member Saurabh Sharma, who was complainant in the case lodged over the event, has also been slapped with a penalty of Rs 10,000 for blocking traffic.
Five members of ABVP have been sitting on hunger strike since yesterday, alleging that the university is "criminalising" patriotism.
The university officials, however, maintained that the decision has been taken after thorough investigation by a five-member probe panel and are in accordance with varsity norms.