A post on Foyle Search and Rescue social media page said Donal Armstrong went missing on Saturday morning. Advertisement Advertisement The post adds that ‘at present FSR is searching using, boat, drone, sonar and shore’ and ‘in coordination with his family they have asked us to share the following information with you’. Did you know with a Digital Subscription to Belfast News Letter, you can get unlimited access to the website including our premium content, as well as benefiting from fewer ads, loyalty rewards and much more.

The experienced team added: “There will be no public call out from ourselves to assist in the search however if you wish to walk the shoreline please do so safely using the following guidelines. "If you have any queries please feel free to get in touch on 02871313800 during office hours 9am to 5pm Monday to Friday.” Advertisement Advertisement In the ‘Search Guidelines’ they advise that Donal Armstong is 23-years, a thin build with short fair hair with a reddish tinge.

“He was last seen wearing navy jacket with a white crest on the breast (ripped on the back right armpit), navy hoodie under the coat and an orange t-shirt below this, Black trousers, Blue trainers with brown soles (heel had light blue lines),” adds the advice. "Your own personal safety is of the highest importance. "Please adhere to the following safety Guidelines when searching: Advertisement Advertisement "Always stay in a group of at least 2 and let someone know the a.