A group of Bangladesh Chhatra League (BCL) activists of Chittagong University (CU) unit allegedly hacked a leader of the same unit on the campus on Saturday night.
Seriously injured, Tayeful Haque Topu, vice president of the unit, was first taken to the university medical centre and later to Chittagong Medical College Hospital (CMCH).
His physical condition is stable, but he is not out of danger yet, said CMCH physicians.
Topu, a graduate student of economics, bore multiple hacking marks in his head, forehead and legs, his brother Ariful Haque Tapu quoted the physicians as saying.
Some 12 masked BCL men of Banglar Mukh, a campus-based BCL group, armed with sharp weapons and machetes attacked Topu when he was chatting with his friends in front of a tea stall near Abdur Rab Hall.
"They hacked him [Topu] indiscriminately," said his friend Mizanur Rahman Mizan, also BCL hospitality secretary of the same unit.
"When I went there to rescue him, they also attacked me and later fled the scene," added Mizan.
Later they were rescued by other leaders.
Meanwhile, Mizan filed a case with Hathazari Police Station yesterday against 13 BCL men including CU BCL leader Abu Bakar Toha, Central Committee Assistant Secretary Diaz Irfan Chowdhury, CU unit Vice President Mohammad Maman in this connection.
Md Balal, officer-in-charge of the police station, said they were trying to arrest the accused.
Diaz and Mamun masterminded the attack to destabilise the campus while their followers carried it out, an allegation of CU BCL President Md Alamgir Tipu, denied by Diaz, who claimed that he did not have any link with CU BCL and knew who carried out the attack and why.
Mamun claimed that he was in Dhaka during the attack and was not involved in it. Following the incident, Topu's followers vandalised residences of Diaz and Mamun in the Gate No 2 area near the campus.