Bar Association Secretary Avinandan Chatterjee said, the sender of the letter, claiming to be a member of the National Democratic Front of Bodoland (NDFB) terror outfit, informed that three bombs were kept in the district court premises and two others in the nearby consumer court complex and police were informed.
A senior police officer said people were evacuated from the court compound quickly and sniffer dogs pressed into action but till now nothing had been found.
Superintendent of Police Akash Megharia was camping at the spot along with the officer-in-charge of local police station.
The SP said investigations were on.