STAFF REPORTERGUWAHATI: The National Investigation Agency (NIA) has summoned former GS (General Secretary) of Cotton University Students' Union Pranjal Kalita to be present on Thursday. As per sources, NIA has summoned Kalita to interrogate on a case registered as 13/19. Also Read: Vishnu idol excavated from Cotton University, GuwahatiAlso Watch: Watch | First Reaction of Assam Chief Minister Sarbananda Sonowal on Union Budget 2020.