Two people, including Samajawadi Party district vice-president Sagheer Ahmad's nephew, was stabbed to death in Aligarh when a mob went on a rampage and ransacked half a dozen shops.
The deceased, identified as 20-year-old Mohammad Adil and his friend Faheem Chaudhary, were stabbed by about six armed men in the Civil lines area on 18 August.
The two were rushed to Jawaharlal Nehru Medical College where Adil succumbed to his injuries.
One of the assailants was nabbed by locals, while the others escaped.
As the news spread, protesters took to the street and ransacked several shops and also attacked a police picket.
Police said that the motive behind the killing was still not clear but it was working on important clues.
Additional Superintendent of Police AK Srivastava said that an FIR had been filed this morning on the basis of the complaint filed by the victim's family.
The main accused in the FIR is Sameer Chaudhary who has a long criminal history.