The airport also received three "specific" calls wherein the callers named a particular flight. According to the standard operating procedure specific threat calls result in longer delays because passengers are off loaded and the aircraft is taken to an isolated bay for through inspection.
The anti-sabotage check that follows is a cumbersome procedure taking up to 4 hours as the search is conducted using explosive sniffer dogs and explosive detectors, said airport official. Although the number of such calls dropped last year as compared to 2011 (362 non-specific calls), security officials said that there is no mechanism to stop the menace. "Most of these calls are made at the airlines' call centres. As a result the security agencies are unable to check their credibility," said a senior Central Industrial Security Force (CISF) official requesting anonymity.