Coimbatore airport put on high alert
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Following the call, security was beefed up at Chennai, Madurai, Coimbatore and Tiruchirapalli airports in Tamil Nadu and at all the three international airports in adjacent Kerala following the phone call.Security personnel at Thiruvanthanpuram, Kochi and Kozhikode airports thoroughly searched some flights which arrived from the Gulf and found no explosive in them, airport sources said.The luggage of passengers were also checked before the flights were allowed to take off.The flights searched were Doha-Thiruvanthapuram-Kozhikode service of Air India Express and Qatar Airways' Doha-Thiruvananthapuram-Doha, airport sources said.The checks, however, did not cause inordinate delay in the departure of the flights, the sources said.