LAHORE - A heavy contingent of the police Wednesday launched a massive search operation in the Punjab University New Campus premises against 'outsiders' after at least 10 students were injured during armed and physical clashes between two groups late night on Tuesday. A police source said that arrests were made during raids on hostels and some other places of the university. The police got vacated 10 rooms of the university hostels illegally occupied by the outsiders. The police, however, strongly denied any arrest. At least seven different teams of the City police took part in the four-hours long search operation. Each police team was being headed by a DSP while the SSP Operations supervised the whole operation. Heavy movement of police vehicles carrying a large number of armed policemen in the university premises created huge panic among the students, varsity staff and other visitors. About clashes between the two student unions, SHO Muslim Town Amir Iqbal said at least 10 students were injured during the clash between the two organisations of the university students. Two of them sustained bullet injuries while others were seriously injured during physical clash between the University Students Federation (USF) and Islami Jamiat Talaba, he said, adding a case had been registered against 15 students of the IJT. Out of these, he said, six were nominated in the FIR registered on Wednesday while others are unidentified yet. The SHO said the police teams entered into the varsity premises after taking permission from the administration. Around two-dozen plain-clothed policemen also took part in the operation. The police teams were formed on the directions of CCPO Lahore when the top government authorities - the chief minister Punjab and the governor - took serious notice of the scuffle between the two groups. The policemen first conducted raids at the hostels pointed out by the workers of USF and the varsity administration claiming the outsiders were residing in these hostels. The police teams raided many other university hostels boarded by the IJT students. DSP Wahdat Colony Tariq Azeem told The Nation the operation continued for four hours and the purpose was to check activities of the non-university students. The police teams searched all the university hostels and other places but found no evidences of the outsiders. To a query, the DSP said neither any illegal weapons nor such other things were recovered from the university premises. He said some police teams had been dispatched to the residences of the accused students nominated in the FIR.