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
The band dedicated their song Everlast to fan Laura Plane, who died from breast cancer last month.
Resham Khan suffered 'life changing' injuries when she had acid thrown at her through the window of her car.
Heavy rain moves in across Ireland but elsewhere skies clear for a chilly night.