The clash erupted after both the factions of the JCD, student front of the ruling BNP, tried to occupy a room at Bangabandhu Sheikh Mujibur Rahman Hall.

A group of 30 armed JCD cadres led by Sohel, a student of history, came to the hall at around 9:30am and asked all the residents of Room No. 222 to leave the room as well as campus.

The cadres, belonging to the group led by president and general secretary of the JCD, also beat up Alamgir, a resident of the room which is under the control of Mamun Group.

They left the hall after the students led by Parvez, president of the hall's JCD unit, protested the incident.

Later, about 60 JCD cadres of the same group equipped with firearms, hockey sticks and other sharp weapons launched an attack on Shaheed Salam Barkat Hall and vandalised two rooms.

They beat up Mamun Mintu, a student of history, ransacked his room and set fire to a motorcycle of Rezaul Karim Razu, a member of their rival faction (Mamun group).

The armed cadres again swooped on Sheikh Mujibur Rahman Hall at around 11:30pm and started searching for Mamun. They confined Shakil, vice-president of the hall's JCD unit, to a room on the ground floor.