Jonathan Cairns was murdered in 1999.
Police have arrested two women in connection with the murder of a teenager in Derry 20 years ago.
Jonathan Cairns was 18 when he was attacked in Ballykelly on his way home from a night out on April 25, 1999.
His body was found the next day in a shallow grave in Loughermore Forest, about five miles from his home.
The investigation into Mr Cairns' murder has involved more than 2,500 witnesses, statements from almost 900 people and 20 searches.
Police today said that detectives investigating the murder of Jonathan have arrested two women aged 72 and 46 years old in the Derry area.
No other details of the arrests were released by the PSNI.
Subscribe or register today to discover more from DonegalLive.ie
Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.
Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.