The students' union demanded a fresh probe panel and insisted that the gherao would not be lifted until some assurance was given in the matter.
Additional Commissioner of Police Debasish Roy along with a strong contingent of police rushed to the campus to control the situation but the impasse continued as the students could not be convinced till midnight to withdraw their agitation.
Police said the students gheraoed VC Souvik Bhattacharya and registrar Pradip Ghosh to protest against the Aug.28 incident inside the campus at a boys' hostel and the delay in the investigation of the same.
The state government has appealed to the students to lift the gherao while education minister Partho Chatterjee said, "This is undemocratic, they must lift the gherao and talk with the authorities.