The students from different dormitories staged demonstration in front of the vice-chancellor's residence around 11 am, and later took position in front of the Central Shahid Minar in Chowhatta area.
The agitating students also put up barricade on Chowhatta intersection around 12pm, halting traffic on the four roads linking the juncture.
They withdraw their blockade around 2 pm after announcing the three-day class boycott programme.
Their demands include starting of case proceedings within three days, recording of the case as murder case, death sentence of the bus driver and his assistant and cancellation of route permit of ‘Udar Paribahan’ responsible for the death.
Wasim Afnan, 22, a 4th-year student of Biotechnology and Genetic Engineering department of the university and son of M Abu ZahedMahbub and Dr Mina Parvin of Rudra village in Nabiganjupazila of Habiganj, was crushed to death by a bus after its helper reportedly pushed him off the vehicle at Sherpur in Sadar upazila of Moulvibazar district on Saturday afternoon.
After the incident, students of the university took to the streets and staged demonstrations at the Sylhet bus terminal in South Surma protesting the death of their fellow at night.
Meanwhile, police arrested bus helper Masuk Ali, 40, son of Daulat Ali of Teghoria area, and driver Jewel Ahmed, 26.
Earlier, the university authorities suspended all classes and examinations for Sunday to avoid any untoward situation.