Arrested last year in connection with a Delhi riots case, former JNU student Umar Khalid tested positive for Covid-19 on Sunday.
A senior official said the 33-year-old Khalid had developed symptoms of the diseases following which he was tested for the coronavirus infection.
Khalid's RT-PCR test report came on Saturday as positive, the official said, adding he has been isolated within the jail premises.
Khaild was arrested for his alleged role in the Delhi riots of February 2020.
(With PTI inputs.)