They were demanding the police take immediate action to find out who was responsible for the alleged slaughter of cows.
The inspector's sister had alleged earlier that Yogi Adityanath was all about "cows, cows, cows" but was not taking action against the killers.
Meanwhile, senior superintendent of police KB Singh directed all 27 police station in-charges of the district to stay alert. However, only Sarfuddin and Sajid are named in the complaint filed by Bajrang Dal leader Yogesh Raj on the basis of which the police booked seven Muslims, including two children, in connection with the case on December 3.
Five police teams have been formed and 22 places have been raided to track down those involved in the violence. They were named in an FIR lodged by the Uttar Pradesh Police against at least 80 people. He wrote on Twitter that the guilty will be punished, and that the state government has promised "extraordinary pension" for the family and a government job for a family member. Police have launched an investigation and said post-mortem examinations would be conducted.
The police inspector's family has alleged a police conspiracy in his death because he was probing the lynching of Mohammad Akhlaq.
The family of the man, a blacksmith, denied the accusation that they secretly ate beef, which is banned in many Indian states including Uttar Pradesh, which is ruled by a Hindu priest from the BJP.
The FIR was registered on the day of the incident, at the Chingrawathi police post.
Abhishek also shared turn of events which led to his father's death and said, "There were reports of some stone pelting in the concerned police station area and when my father reached the spot he was hit by a stone on his head".
According to the DM, the mob comprised around 400 locals. The current incident happened 45-50 kilometres away from where the Ijtema was held.
A police officer in northern India was killed trying to calm a mob angered by reports that cows, regarded by Hindus as holy, had been slaughtered in the area.
Analysts feel that the riot was a conspiracy which has occurred at a time when lakhs of Muslims are travelling to Bulandshahr for a Tablighi Jamaat's ijtema (religious gathering) since December 1. Following this, the police were informed about the incident.
UP Director General of Police O P Singh, who was also present at the meeting, said Adityanath assured the family that education and house loans taken by them would be paid off by the government. The inspector died before he could be treated.