The Delhi Police on Thursday detained 15 more people for their suspected involvement in the violence during the farmers' tractor parade in the national capital on January 26. Nearly 30 farmers who were camping at DDA Ground in Burari were also moved towards the Singhu border to clear the site. The police also stepped up security at the Red Fort, which was stormed by a large number of protesting farmers who deviated from the designated parade route on Tuesday, and Singhu and Tikri borders.