Pro vice-chancellor S Dutta said that he and the vice chancellor slept on the floor of his room last night while food was brought in by their colleagues.
There was no question of reconsidering their demand, Dutta said, adding the teachers were talking to students for lifting the gherao by a section of engineering faculty students which was continuing for 44 hours since Wednesday afternoon and hoped they would be able to make them understand.
University authorities told PTI that VC Souvik Bhattacharya and pro-VC Siddhartha Dutta were taken ill last night and were immediately attended to by doctors.
Doctors examined both of them and advised them rest, they said.
The police said university authorities have not sought their help to free them from gherao and the situation remained peaceful.
Both of them - a construction engineering student and another of printing technology stream - have also been asked to vacate hostel rooms immediately.
The students claimed that it was not at all a case of ragging "for which the two students have been wrongly slapped suspension orders".
They also urged the vice-chancellor to reconsider the decision on suspension.
