Gardaí are still investigating the circumstances behind the sudden death of 18-year-old man in Stranorlar on Monday evening.
The teenager, who has been named locally as Dean Lafferty, died at his home at Admiran Park at around 8pm on Monday.
A post mortem was carried out on the remains on Tuesday.
It is understood gardaí are working on the theory the teenager may have suffered a blow to the head.
Local councillor Patrick McGowan said the death has left a dark cloud over the community.
If you have a story or want to send a photo or video to us please contact the Donegal Live editorial team any time. To contact Donegal Democrat and Donegal People's Press, email email@example.com To contact Donegal Post, email firstname.lastname@example.org To contact Inish Times, email email@example.com.
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.