"You can see billowing smoke and flames above the roof on the far side".
They tweeted: 'At present we do not have a firm estimate as to when #Nottingham station will be able to re-open however we expect trains to be disrupted on all routes through Nottingham for the whole of Friday 12th January'.
A huge blaze has closed Nottingham railway station, causing major disruption.
All trains on the Nottingham to Lincoln line have been cancelled for today due to a large fire at Nottingham Station.
"We've got in the region of 60 firefighters here at the scene and we're fighting the fire from inside the building using breathing apparatus, hose reels and jets".
A spokeswoman for East Midlands Ambulance Service said there were no reported casualties.
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Bryn Coleman, incident commander for Nottinghamshire Fire and Rescue Service, told BBC Breakfast: "Crews arrived at approximately 6.30am to a significant fire in the new section of the train station".
"It's quite an old building - we believe it's a listed building - and we have fire in hidden voids there so the crews are now working to expose those voids but there is significant damage to the walkways which go across the railway station".
Disruption is expected to continue for much of the day.
East Midlands Trains advised people not to travel "unless it is absolutely necessary" and said trains "cannot run to/from Nottingham".
Queens Road and Carrington Street have been closed in both directions which created heavy traffic on surrounding routes, especially on London Road and Radcliffe Road. The station is now closed and all of our trains can not run to/from Nottingham. Along with station closure, the blaze caused several road closures nearby and disrupted airline passengers booked on flights early Friday at East Midlands Airport.