The celebrated police officer was also involved in numerous operations against gangsters in Mumbai and terrorists during his decades-long career.
A Naxal was killed in an encounter with security personnel in Chhattisgarh's Sukma district on Tuesday morning, an official said.
Further details are awaited.
They reportedly hurled country-made bombs at the police and when police closed in on them, attacking the police with machetes, and injuring a head constable and a police constable.
Security forces launched a cordon and search operation in Okay village of Kulgam district which turned into an encounter.
Another encounter broke out between the ultras and security forces at nearby Gasu village, police officials said.
The top cop also said the political leaders' comments are unlawful and the law will take its own course in the matter.
The three ultras were killed in the encounter at Pantha Chowk on the outskirts of Srinagar city, a police official said.
The petition states that at the tender age of 10, Amir assisted his father and his mother in fighting a militant and got him neutralized in Gaol.
In the last about five days, security forces have carried out multiple operations across the valley resulting in 11 hardcore terrorists being neutralised, killed.
Demanding an independent investigation into the matter, NC spokesperson Imran Nabi Dar said the "self-trial" by police in the form of SIT "stands rejected" by the affected families.
Lateef Magray, father of Amir Magray who was among the four persons killed in the encounter, said the SIT report is nothing less than lies.
It asserted that foreign militant Bilal Bhai and local militant Amir Magray were killed in the gunfight on November 15.
Among the six ultras, who fell to police bullets in a 30-minute gunbattle with Greyhounds of Telangana and Chhattisgarh police, were four women.
Incriminating materials, including arms and ammunition, were recovered.