An 18-year-old protester was killed and another policeman was injured. But eyewitnesses, some of whom were watching from the other side of the road, said the violence broke out only after the police fired into the air to try and disperse the crowd.
Rehman is heard saying in a video accessed by The Quint. Following this, the police were informed about the incident.
Additional forces have been deployed to maintain peace in the area.
Meanwhile, police have arrested four persons in connection with the violence. On Tuesday, Additional Director General of Police (Law and Order) Anand Kumar identified those arrested as Chaman, Devendra, Ashish Chouhan and Satish - all named in the FIR - and said that prime suspect Yogesh was still absconding.
A crowd angered over what they believed was the slaughter of the cow threw stones and torched vehicles outside a police station.
Abhishek Kumar, son of the deceased cop Subodh Kumar who was shot dead on December 3rd during Bulandshahr clashes, presented a fearless face amid the unfortunate loss and asserted that his father always wanted his children to respect all religions. "Today my father lost his life in this Hindu-Muslim dispute, tomorrow whose father will lose his life?"More news: North Atlantic Treaty Organisation accuses Russian Federation of breaking INF; Pompeo threatens withdrawal
Demanding "martyr" status for the slain inspector, who was one of those who initially probed the 2015 lynching of Mohammed Akhlaq, his sister alleged his killing was a conspiracy of the police.
Uttar Pradesh Chief Minister Yogi Adityanath addresses a press conference in Lucknow on Aug 12, 2017.
Angry villagers and members of various Hindu groups brought the animal remains in tractor-trolley to the Chingarwathi Police Chowki and demanded action against the culprits.
Bulandshahr MP Bhola Singh and local MLA Devendra Lodhi, both from the BJP, visited Sumit's family in Chingrawathi. Police have launched an investigation and said post-mortem examinations would be conducted.
AIMIM leader Asaduddin Owaisi alleged that those fuelling violence in the name of the cow had been receiving full protection from the BJP and the RSS.
The police retaliated with a baton charge after the mob allegedly set fire to the police station and several vehicles parked outside.