The inauguration of a NSG hub near Kolkata tomorrow has been postponed in view of the earthquake in Sikkim, the West Bengal Chief Minister, Ms Mamata Banerjee, said today. “The NSG hub inauguration has been postponed due to the natural calamity,” Ms Banerjee, who was in north Bengal to oversee rescue and relief operations after Sunday's devastating earthquake, told PTI. The inauguration by the Union Home Minister, Mr P. Chidambaram, with the West Bengal Chief Minister as the chief guest would be held at a later date, she said.