A number of people have been killed in a helicopter crash in the Mourne Mountains in Co Down.

The coastguard service and mountain rescue teams were joined by fire crews in a search near Hilltown after eyewitnesses reported an aircraft in distress at around 4pm.

The helicopter, a six-seater craft, was travelling from Co Fermanagh and crashed at the Leitrim Lodge Picnic area in the mountain range.

It is not yet clear how many people were on board the aircraft.