Recap in picturespublished at 15:26 GMT

The front of the train has been damaged and the windscreen is covered in what appears to be mud
Image source, Gordon Head/NodrogNetwork Rail says there was a landslip in the area, but an investigation is being carried out into the exact cause of the derailment
Image source, Rebecca McCarthyPassengers were pictured walking away from the scene
Image source, Getty ImagesEmergency services at the scene as the investigation continues

















