Updated Feb 20, 2021 | 19:49 IST Thousands of protesters had clashed with the police during the tractor parade called by farmer unions on Republic Day to highlight their demand for the repeal of the Centre's three farm laws. Farmers remove police barricades set up near the Red Fort on Republic Day | Photo Credit: PTI New Delhi: Amid the ongoing investigation, the Delhi Police on Saturday released the photographs of 20 people who were allegedly involved in the violence that broke out at the Red Fort during the farmers' tractor parade on February 26. The Delhi Police has been using facial recognition technology to identify the culprits from the unidentified huge crowds. The police said they are scanning the videos and releasing the pictures of the accused from them.