Three people have been arrested and four other detained in connection with the violence that broke out in Bulandshahr on Monday evening, killing a police official. On December 3, a mob rampaged in Bulandshahr against alleged cow slaughter, during which the police officer, an SHO, and a youth died. Security has also been beefed up in the Gautam Buddh Nagar district of western Uttar Pradesh and adjoining areas in the aftermath of the violence.