Thiruvananthapuram (PTI): Security was on Friday stepped up in all the three international airports in Kerala following an alert about LTTE threat to the key installations, police sources said here.
The Air India security office here received the alert message from its Mumbai office, they said.
The CISF, incharge of airport security, has stepped up vigil at the airports in Thiruvananthapuram, Nedumbassery (Kochi) and Karippur (Kozhikode).
A report from Kochi said the airport director asked all security personnel and police to tighten security further, airport sources said.
A special meeting was conducted by the CISF Commandant Rajiv Panth to evaluate the security measures.