A section of the A5 road from Derry to Strabane is closed this Monday morning due to an “ongoing incident”.
The Victoria Road in Strabane road is closed from the junction with the Woodend Road, Strabane and Duncastle Road, Newbuildings.
Local diversions are in place and signposted.
A PSNI statement said: “The road is likely to be closed for some time and an update will be provided in due course.”