Srinagar /Imphal /Agartala, Aug 14 (ANI): Security has been beefed up across India on Thursday as thousands of police and paramilitary personnel kept a hawk-eyed vigil to thwart any possible threats ahead of Independence Day. Police and paramilitary personnel have been deployed at the airport, market places, railway stations, inter-state bus terminals and metro stations in major Indian cities. Parking lots in the Delhi Metro stations have been closed from today till the next afternoon due to security measures. Tight security blanket has also been thrown in Srinagar city of Jammu and Kashmir as armed paramilitary personnel and police guard stand outside the Bakshi Stadium, the main venue of the Independence Day function. Public relation officer of India's paramilitary Central Reserve Police Force (CRPF), Kishore Prasad, said three-tier security arrangement has been made in the valley.