At around 6.30am yesterday, a man was challenged after smashing a window to gain access to the Main Street premises.
He stole a sum of money, but ran off when told police were on their way.
He is thought to have made his getaway in a car that was heard travelling towards Ballyshannon.
The man was described as being in his mid 20s and was wearing a hooded top and tracksuit bottoms ...
Gardai in Donegal Town are continuing their investigations into two burglaries at neighbouring houses in Mullinasole last week.
The culprits got away with 11,000euro worth of goods, including a laptop and camera.
On Friday, two houses in the Creevy area were targeted.
Thieves made off with a computer from one residence and a mobile phone from a car parked at the house.
A short time later, they attempted to gain entry to another house in Creevy but fled the scene after being disturbed.Let the Gardaí know if you've seen anything.