Police in Strabane are treating a fire at the old Adria site yesterday evening as arson.
At around 6pm, police received a report that a dumper truck had been set on fire in the Beechmount Avenue area.
Police attended the scene along with NIFRS and discovered that a truck had been set alight deliberately.
Police are appealing to anyone who may have noticed anything suspicious in the area or who may have any information to come forward.