A bomb threat received by the Rajiv Gandhi International (RGIA) Airport here by e-mail turned out to be a hoax, police said on Tuesday.
The airport's customer care section received the mail on Monday about the bomb threat and a thorough check was conducted by security personnel and no explosive or suspicious item was found and the threat turned out to be a hoax, they said.
Later, another message was received from a person, apologising for the previous one, saying his son was "mentally unsound" and that he had sent that message.
"We are verifying both the messages," a police official said.
A case was registered at RGI Airport police station and further investigations were on.
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