Swiss train operator Rhätische Bahn has confirmed that one if its trains had derailed.
The company tweeted that some carriages have left the track. The derailment has happened near Tiefencastel in the east of the country.
At the moment there is no information about casualties. Rescue organisations local police and representatives from the rail company are at the scene.
Bei Tiefencastel sid wegen einer Rüfe einige RhB-Wagen entgleist, keine Infos zu Verletzten. Rettungsorganisationen vor Ort. Infos folgen.
More top news
Strong winds and rain, heavy at times in the south-east, are forecast for the UK on Tuesday.
The plan to scrap the VAT could save taxpayers £2 billion if Britain left the EU, lead Leave campaigners claim.
As airstrikes continue in Yemen, the scale of the devastation and tragedy visited on civilians becomes incalculable.