"Umar Khalid is trying to garner compassion under the pretext of religious discrimination in order to conceal his anti-national activities. He and his other colleagues must be arrested immediately," HJS said in a release.
The right-wing organisation also claimed that the Jawaharlal Nehru University (JNU) row "is purposefully painted to be a case of religious discrimination".
Khalid is one of the five students who had gone missing from the campus since February 12 after JNU students union president Kanhaiya Kumar was arrested on sedition charges for allegedly raising anti-India slogans during a controversial event at the campus.
On February 21, Khalid and the other four students had surfaced on the JNU campus.