The train line has been closed between Portadown and Lisburn.
NI Railways says it followed due to a “trespass” incident between Lisburn and Moira.
It says it is in the process of organising substitute bus services for passengers.
Train tickets will be valid on a bus for the same route.
There are no further details at present.
For all the latest breaking news across the county and two council boroughs in Armagh and Newry, follow Armagh I on Twitter @armaghi. You can now follow us on Instagram @armaghi2012. If you have a story/image/video you would like to send to us, or if you wish to contribute editorially to the website, you can email us directly at info@35.242.148.148.
Most read today
Operator’s Licence Notice
