Union Minister Babul Supriyo was today shown black flags and was allegedly heckled by some students at Kolkata's Jadavpur University. Mr Supriyo was on a visit to the varsity to address a seminar organised by the Akhil Bharatiya Vidyarthi Parishad, or ABVP, the students' body linked to the BJP. Mr Supriyo was initially stopped from entering the campus for over an hour. Students affiliated to two Left-leaning organisations - Arts Faculty Students' Union (AFSU) and Students Federation of India (SFI) - also raised slogans "Babul Supriyo Go Back" against the BJP leader.