Indian Air Force personnel, including air traffic controllers, have been put on emergency standby in view of Left-controlled Airport Authority of India Employees unions' threat to go on strike.
A defence ministry spokesman said all IAF Air Traffic Controllers and ground controlling staff have been told to be on 24 hours standby in case the unions carry out their threat and disrupt civil flight operations.
The Airport Authority of India Employees Joint Forum on Tuesday threatened to stop work immediately after the formal announcement of the contract for modernisation of Delhi and Mumbai airports.
As soon as formal announcement of the bids are made, airport employees and officers across the country would stop work, M K Ghoshal, convenor of the AAI Employees Joint Forum said.