Firefighters are tackling a gorse fire near Spelga Dam in the Mourne Mountains.
The Northern Ireland Fire and Rescue service (NIFRS) received a report of the blaze at 18:39 BST on Monday. About four acres of gorse was on fire.
Twenty-eight firefighters are currently at the scene, with three fire engines, two Land Rovers and a water tanker.
Road closures are in place in the Kilkeel Road and Slievenaman Road areas of Hilltown, County Down, police have said.
