The Institute of Health Technology (IHT) in Rajshahi has been closed for an indefinite period.
The authorities took the decision on Wednesday following an attack on the students allegedly by some activists of Bangladesh Chhatra League (BCL), the student wing of ruling party Awami League, that left five female students injured.
The BCL men swooped on the students when they went to the principal's room for lodging complaint against extortion and harassment by BCL activists.
UNB said all male students were asked to leave the dormitories by 1 pm while the female ones by 3 pm, said IHT principal Dr Sirazul Islam.
The decision was taken at an emergency meeting of academic council to fend off any unwanted situation, he said.
The attack left five students - Rupa, 19, Naznin Aktar, 18, of Pharmacy Department, Nishat , Mohona, Afrin Sharmin and Bristy, 18, of Laboratory Department injured.
Some students in the morning submitted a memorandum to the principal demanding punishment of the BCL leaders who allegedly harassed students and extort money from them.
