A man has been arrested by gardaí investigating a murder in Co Donegal five years ago.

Andrew Allen, from Co Derry, was shot dead at his home at Links View Park, Buncrana, on 9 February 2012.

The victim, who was from the Top of the Hill in the Waterside area of Derry, was one of several allegedly intimidated out of the city by dissident republicans.

He had moved to the Links View estate in Buncrana, where he was gunned down through a window after a group of men tried to break down the front door.

Gardaí arrested a man in his early 50s in the Co Donegal area last night.

He is being detained at Letterkenny Garda Station.