Delhi Police PRO (Public Relations Officer) Chinmoy Biswas informed that the security across the national capital was beefed up amid 'Chakka Jam' call given by farmer unions. He added that the nationwide road blockade call was not for Delhi but in wake of January 26 violence, the security was tightened to stop any untoward activity. "Wherever we had inputs that some groups or people can execute some incidents (during Chakka Jam), preventive detentions were made in public interest. Some people had reached Shaheedi Park. They were removed from the road so that traffic movement could resume," he said.