A person who was disqualified from driving was discovered driving a van while under the influence of drugs last night.
Gardaí with the Buncrana Roads Policing unit made the detection on Friday evening.
The van driver was stopped, and it transpired that they were disqualified from driving and had no insurance.
A drug test returned a positive result for the presence of cannabis.
The driver was subsequently arrested and will appear in court at a future date.
The van was detained by gardaí.