Firefighters are at the scene of a large gorse fire on Slieve Binnian in the Mourne Mountains.
Six fire appliances and a command support unit are working to tackle the blaze.
The Northern Ireland Fire and Rescue Service (NIFRS) has asked residents to keep windows and doors closed while firefighting efforts continue.
It follows two other fires in the area last week, one near Silent Valley and another near Castlewellan.
