Visakhapatnam Police Commissioner Amit Garg confirmed that the Visakhapatnam Airport authorities had received the threat letter a few days ago.
The letter, written in Telugu and purportedly originating from Nirmal town of Adilabad district of Telangana, was sent via post to Visakhapatnam Airport Director. It has warned of "targeting" the Chief Ministers.
Besides the Vizag airport, the letter has also threatened to blow up other vital installations, including the Satish Dhawan Space Centre (SDSC), also known as Sriharikota Range (SHAR) in Nellore district and ports in Andhra Pradesh, a senior police official said.
