Many anti-social elements and terror groups use different methods to conceal their identity to escape from the security agencies.
According to ABP News, after the receipt of the letter from the terrorist organization, the NIA alerted concerned security agencies regarding the same.
National Investigation Agency (NIA) team reached Baimal, an Indo-Pak border village to trace the footprints of terrorists.
The Burdwan blast case investigation is not just limited to the West Bengal. The case is definitely an interstate operation which also concerns Assam