An unidentified person called up a top airport official here informing a bomb would go off on its premises on Tuesday, police said.

Police and bomb detection squad with sniffer dog conducted a thorough checking after the caller told the air port Terminal Manager at 4.25 am that a bomb had been planted in the airport premises and it would explode at 8 am.

However, the call turned out to be hoax, police said.

Police noted that the call had come from Tirukattupalli in Thanjavur district.

On verification, it was identified that the SIM card of the number had been sold by one Mubarak Hussain, a fancy shop owner, who was also selling SIM cards of various telecom service providers.

Police said they were in search of the caller.