Police said a contingent of police and CRPF men launched a joint search operation at Bishember Nagar area of uptown Srinagar in the early hours on Sunday.
One of the killed terrorists Rayees Ahmad Bhat was carrying an ID card of the media.
In order to disperse the mob, smoke canister shells were used as per the SOPs, the official said. He said a case was registered and 15 identified persons were arrested.
Acting on specific inputs about the presence of militants in the Nowgam area of the city, the security forces had launched a cordon-and-search operation there.
Two Lashkar-e-Taiba militants were killed in an encounter with security forces here in Jammu and Kashmir on Saturday, police said.
The three ultras were killed in the encounter at Pantha Chowk on the outskirts of Srinagar city, a police official said.
Police had said Pakistani militant Haider Bhai, his associate Amir Magray, OGW Mudasir Gul and businessman Altaf Bhat were killed in the Hyderpora encounter.
The ultras were killed in a brief shootout near the Rambagh bridge on Lal Chowk-Airport road, the officials said.
In nine encounters in 2020, 19 militants, including Hizbul Mujahideen chief Dr Saifullah, were killed in Srinagar.
The three families have also demanded return of the bodies which have been buried by the police quietly in north Kashmir's Handwara, for proper burial and inquiry.
A police officer said the terrorists fired upon a police party, which retaliated killing a A Lashkar-e-Taiba (LeT) operative.