The youths, staying in private hostels and belonging to two different groups, clashed last night over a petty issue, SP (Rural) Surendra Tiwari said.
They broke windshields of 12 four-wheelers and pelted stones at each other, he said.
DIG Nilabja Chaudhary, SP (Rural) Surendra Tiwari and police personnel from several police stations rushed to the spot on receiving information about the incident.
Eight youths arrested in connection with the matter were identified as Anmol Singh, Amit Kumar, Vikas Shukla, Vinit Parwar, Ashish Pandey, Raghvendra Yadav, Dhirendra and Raghvendra, the SP said.