"Policemen have been deployed in large numbers outside the university campus to prevent any untoward incident. A case has been registered and the accused will be produced in court," said a senior police officer.
The four men were identified as Nitin Kapoor, Ankit Nanda, Amit Chauhan and Gagan Kumar.
According to students, the trouble started when four men in an inebriated state were caught misbehaving with women students and threatening a security guard by putting a gun to his head on the university campus.
"I was going with my friend when a car crossed at high speed. They almost knocked us down and started passing lewd remarks. I reported the matter to one of the guards on duty," said Vibha Iyer, a PhD student.
According to the students, the four men drove into the south Delhi campus around 3.30 p.m. Sunday and were drinking in their white Hyundai Accent car.
"After the matter was reported to security guards, one of the four men put a gun on the guard's head saying he was son of a senior police officer," said Saurabh Gupta, a student at the university.
The students caught hold of the youths and called the police. However, students did not allow police to take the youth outside the campus till late in the evening demanding apologies from them. Police made a baton charge and lobbed teargas shells to disperse the students.