Cannabis - file photo
Gardaí at the Letterkenny Garda Station received a report of a driver whose driving was causing concern this morning.
On foot of this report, gardaí subsequently stopped the driver in question, he was arrested and a drugs test was conducted at the garda station in Letterkenny.
The driver tested positive for the presence of both cocaine and cannabis.
Further investigation will take place and a court case.
Gardaí urge road users to never drive under the influence of alcohol or drugs.