Other interested players include GMR, GVK, Essel, Siemens, Flemingo, IBDF Zurich and Cochin International Airport.
Thousands of Airports Authority of India employees meanwhile staged demonstrations at airports across the country today to protest against the government's attempt to privatise Chennai, Kolkata, Jaipur and Ahmedabad airports, in which AAI has already invested Rs 5,000 crore.
Its employees' union has also warned the government of blocking airports if it does not drop its plan.
"As many as nine players including the international companies have shown interest in the modernisation of the four airports for which the AAI had invited Request For Qualification (RFQ) early last month," said a source.
AAI had invited RFQ for the operations, management and development of Kolkata, Chennai, Jaipur and Ahmedabad airports in January after the government changed its stance and decided against full privatisation of airports.
Sources said GMR Airports, GVK, Tata Realty, Essel, Adani Ports and Special Economic Zone, Siemens Postal Parcel and Airport Logistics, International Business Development Flughafen (Zurich), Flemingo Duty Free Shop Pvt Ltd and Cochin International Airport have shown interest in taking part in the modernisation of these airports.
Sources also said that the private players have sought from AAI longer concession period than the 30 years as stipulated in the RFQ besides traffic growth and tariff projections.
"Some of the interested firms want AAI to make prior airport experience mandatory before taking a final call," said a source.

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