Days after the Kolkata's Netaji Subhash International airport received two threat calls to blow up the airport, the control room at the West Bengal state secretariat "Nabanna" today received a similar call threatening to "blow off" the building this afternoon. Meanwhile security has been beefed up.
According to reports, Nabannas control room received an anonymous call at around 9:22 am., where a mail voice threatened to explode the building at 2 pm. in the afternoon.
A heavy police force rushed to the spot and security in the building has been tightened.
Kolkata Polices bomb disposal squad, along with sniffer dogs, are conducting search operation there and no suspicious object has been found from the area so far. Police have started investigation into the matter to trace the caller.