Union home ministry has issued an alert to all states and security agency after receiving intelligence inputs that terrorists may launch a chemical attack by releasing toxic gases at airports bus stands, Metro and railway stations.
As per media reports, the security agencies have been asked to keep a tight vigil for any substance that could release toxic substance.
The ministry wrote a letter on September 1 to all states, aviation ministry and other agencies, informing that central security agencies have given input that terrorist are planning to target aircrafts.
Last month, Australian police had foiled a similar bid when they averted an attempt to bring down a commercial aircraft.
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