A quantity of diesel was stolen from a parked car at a hotel carpark on the outskirts of the city in recent days.
The theft took place overnight on Saturday/Sunday.
There has been a recent increase in the theft of diesel from vehicles and gardaí are warning people to be extra vigiliant and to report any suspicious activity to them.
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.