News of gunshots at Delhi's Indira Gandhi International airport, at 1:00 am on December 5, set the alarm bells ringing once again.

Operations were cut short for 45 minutes during which the police and CISF swept through the terminal but could not find any proof of firing. The operations recommenced after an all-clear was issued. The police are still carrying on the investigation of the cause of the scare.

"We received a call that some passengers heard a sound similar to two gunshots, but there were no eyewitnesses. No evidence has so far come up to suggest that it was a firing and we cannot confirm it as a gunshot," said DG CISF Udayan Banerjee.

In a separate incident following the gunshots, a white Qualis car tried to approach the arrival terminal from the wrong side and also sped past the security check at the exit gate. Speculations are that the man driving the Qualis might have fired the gunshots.

"One car sped past from here. We even tried chasing it but it managed to give us the slip," said Banerjee.