New Delhi/Mumbai/ Srinagar, Jan 25 (ANI): Security has been beefed up in the entire nation ahead of Republic Day celebrations. Various check-posts have been set up in the national capital. The security forces have been kept on high alert in regard to the celebrations as they continued checking and frisking vehicles. Security arrangements have tightened at the Chattrapati Shivaji International Airport in Mumbai. High alert has been issued in Jammu and Kashmir, especially in view of the recent Pathankot terror attack. Police personnel have been deployed in strength in the city, particularly around Bakshi Stadium, the venue for the main Republic Day parade in the Valley, to foil any attempts by militants.