Security across the national capital tightened on Saturday with the deployment of extra forces, putting up multi-layered barricades and barbed wires on the roads ahead of the proposed 'chakka jam' by farmer unions who were protesting against the Centre's farm laws for over two months. Farmer unions on Monday announced a countrywide 'chakka jam' on February 6. Heavy deployment of police personnel seen at Red Fort, as a preventive measure to dispel actions resulting from the calls for 'Chakka Jaam.' Police along with the barricading measures at the Minto Bridge area deployed. The area has been blockaded as a peremptory counter-measure to thwart the calls. Barbed wires placed over police barricades seen in Delhi's ITO area.