Quota protesters laid siege to the residence of the Jahangirnagar University vice-chancellor Monday night protesting at attack on their procession on the campus earlier on the day.
Over three hundred protesters took position in front of the vice-chancellor's residence on the campus protesting at the attack and demanding immediate punishment of the attackers.
Meanwhile, they chanted slogans blaming JU proctor Alamgir Kabir and the university administration for their alleged indifference over the incident.
Earlier, Jahangirnagar University unit of Bangladesh Chhatra League launched an attack on an anti-quota procession at about 7:00pm on the day, leaving at least 70 injured.
In charge of JU medical centre, Shamsur Rahman, said that more than 30 students were sent to Enam Medical College Hospital in Savar with serious injury.
Eyewitnesses said that the BCL leaders and activists launched the attack when a procession, criticizing a remark of prime minister Sheikh Hasina, reached the university's Bangabandhu Sheikh Mujibur Rahman Hall.
Coordinators of the movement Abdur Rashid Jitu, Mahfuz Megh, Jahidul Islam Bappy, acting teacher of the university's transport office Professor Awlad Hossain were among the injured.
'They attacked our procession with sharp weapons and harassed female students too', a coordinator of the movement, Touhid Md Siyam, said.
He also said that BCL president Akhtaruzzaman Sohel initiated the attack on the protesters with iron rods while general secretary Habibur Rahman Liton led another attack from the other side.
JU proctor Alamgir Kabir said, 'We are trying to bring the situation under control.'