Kolkata: The server room of the passenger reservation system of eastern India is housed at the multi-storied building, said the railway official’s sources. Electricity was disconnected at the building since the fire was reported in the evening, he said.

This led to disruption in the computerized ticket booking in the entire eastern zone, the official said. At least seven people were killed in the fire in the multi-storeyed New Koilaghat building here which houses the offices of Eastern and South Eastern Railways, Chief Minister Mamata Banerjee said.