The observers wore black badges and held different programmes including a discussion and a human chain on the campus demanding the culprits be punished.
A discussion was held in the TSC auditorium in the morning with DU Vice-Chancellor Professor AAMS Arefin Siddique in the chair.
The VC demanded exemplary punishment for those who were involved in the incident saying : “If the guilty are put on trial, nobody will ever dare do such a thing in the future.”
A protest programme was held at DU Aparejeyo Bangla premises where professor Anwar Hossain who was arrested in 2007 urged the government to punish those involved that day.
On August 20, 2007 army personnel assulted three DU students and insulted a teacher at the DU gymnasium during a football match.
The incident sparked clashes between police and students, spreading from DU to other educational institutions in the country.
Two DU professors Anwar Hossain and Harun-ur-Rashid were arrested on August 23, 2007.
Following the incident Professor Sadrul Amin and Professor Neem Chandra Bhowmick and a number of students were also arrested.
The unrest led to the arrest of several DU and Rajshahi University students and teachers charged with breaking the emergency power rules.