The Uttar Pradesh Police arrested two men and detained four on Tuesday in connection with the mob violence in Bulandshahr district that led to the death of police inspector Subodh Kumar Singh and another person on Monday. Two special investigation teams (SITs) are probing the Bulandshahr violence case.

An FIR was filed in the early hours of Tuesday under IPC sections dealing with murder, rioting and assault. According to the police, 28 people have been named in the FIR while 60 people have been listed as unidentified. Among those named is Yogesh Raj, reportedly a senior Bajrang Dal leader who had earlier lodged a police complaint alleging cow slaughter.

At a press conference in Lucknow, Prashant Kumar, ADG (Law & Order), Meerut Zone, said on Monday two SITs, one of them under IG Meerut Zone, had been formed to investigate why the violence happened and why Inspector SK Singh was alone at the scene of crime.

Inspector Singh was shot in the head in the violence, while a young protester, Sumit, was killed as the police tried to tackle the mob.

READ | Cop dies in violence over alleged cow slaughter in Bulandshahr

The violence had broken out after alleged recovery of some animal carcasses. According to a statement issued by the police on Monday, they had got information from the Gram Pradhan in the morning that cow meat had been found in Mahavas village, after which Inspector Singh went there for an investigation.

Villagers had reached Chingravathi chowki of Syana by then, carrying the the meat in a tractor trolley, and jammed the busy Bulandshahr road. When Singh attempted to clear the traffic snarl, he was attacked by the mob and shot dead from point blank range.

Singh, the station house officer of Syana, had probed the 2015 lynching of Mohammed Akhlaq in UP’s Dadri, also over allegations of cow slaughter.

The situation is still tense in Bulandshahr. Security forces have been deployed in large numbers in the area.