The security alert is in Newry Army bomb experts are examining a suspicious object in Newry.
A number of road closures have been put in place in the city due to the security alert, which was reported at 1900 GMT on Friday.
The object is being examined at the Camlough Road roundabout.
The Five Ways roundabout, the Camlough Road, the Forkhill roundabout, the Redbridge Road, and the A1 at Carnbane South are all closed.
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