Police have been kept on high alert at several points in and outside the campus to meet any eventuality.

The university proctor-body at a meeting on Friday night took the decision to increase security measure on the campus considering the alleged Islami Chhatra Shibir (ICS) involvement in the attack.

"We are conducting an in-depth investigation into the incident," said Prof Kamrul Ahsan, proctor of JU.

"The ICS activists are carrying out activities on the campus in the guise of JCD activists," said Prof Anu Mohammad of Economics department.

"Despite repeated attempts in the past, Shibir cadres never succeeded in taking control of the campus and we must be united to resist the evil force," he added.

Sources said both factions of the JCD are flooded with undercover Shibir activists who are planing to get them locked in bloody clashes to capture the campus.

The Shibir activists have also made a list of progressive journalists, cultural and political activists who are raising voice against the revival of ICS activities on the campus.

"Thursday's incident is a clear indication of ICS involvement in it. We are now more aware about Shibir activists and we will prevent them from entering the campus," said Parvez Mallick, president of JU JCD.

Meanwhile, General Secretary of JU JCD Ehsanul Huque Ashish who led the attack was expelled from the party on Friday evening.

The Progotisheel Chhatra Jote yesterday brought out a procession on the campus protesting the attack.

They also submitted a memorandum to university authorities demanding exemplary punishment to those responsible for the attack.