The protesters coverged at the campus, responding to the 'Chalo HCU" call by the Joint Action Committee spearheading the stir.
"Students and others have come in from different parts of the country. There are more than a thousand gathered here. Situation is under control," HCU chief security officer TV Rao said.
Security was beefed up with a large number of police personnel being deployed around the campus as a precautionary measure.
Earlier, some students and their supporters had complained that the police were not allowing them to enter the campus.
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Their demands include outster of Vice Chancellor P Appa Rao, who has proceeded on leave, and passing a "Rohith Act" to prevent suicide of ST, SC, BC and minority students in universities, the protesting students said.
The students and SC/ST faculty and officers forums had objected to the choice of Vipin Srivastava, the senior- most Professor, to perform the duties of the Vice Chancellor alleging that he headed the Executive Council Sub-Committee "which has been responsible for the death of Rohith" and was one of the "accused" in the suicide of another Dalit student.
The students who gathered on the campus included those from Calicut University in Kerala, Pondicherry University, Osmania University and Maulana Azad National Urdu University.
As part of 'Chalo-HCU' programme, the agitating students marched from HCU shopping complex area, the hub of the protest, to the main gate and administrative building and back.
The hunger fast was also resumed on the campus yesterday
A health check will be conducted on the fasting students today, Dr Ravindra Kumar, said a senior doctor at the health centre in the University.
Meanwhile, Rohith's mother Radhika was admitted to a private hospital yesterday after she complained of chest pain, Kumar said, adding, she has been kept under observation in the ICU.
The university had on Sunday put a notice on its website saying the Vice Chancellor will be on leave and that Vipin Srivastava, the senior-most Professor, shall perform the duties of the Vice Chancellor. It did not mention the period of leave.