New Delhi, Feb. 16 :     The Central Industrial Security Force (CISF) has started providing enhanced security to five airports at Patna, Baroda, Jaipur, Port Blair and Guwahati. In the second phase of strengthening security in domestic terminals - which begins after Assembly polls in Bihar, Manipur, Orissa and Haryana - CISF personnel will be deployed at airports in Dibrugarh, Agartala, Lucknow, Bhubaneswar and Raipur. The paramilitary outfit, whose primary role is to safeguard the country's vital installations and public sector undertakings (PSU), has already 'bid' for providing security to all airports within the country, including the ones in the four metros. A senior home ministry source said that one reason for handing over airport security to the CISF is because 2,000 of its personnel have not been paid salaries for many years by several sick PSUs. Their pay cheques were being borne by the home ministry, the source added. The 2,000 security men have already been deployed at the Patna, Baroda, Jaipur, Port Blair and Guwahati airports. The force, which has a total strength of 85,000, will deploy 10,000 jawans once it is formally asked to take over security at all airports in the country. 'A scheme has to be worked out between the government, the Airports Authority of India and the ministry of civil aviation on the salary that will have to be paid,' a home ministry official said.