Six people were arrested on Tuesday as Gardai carried out raids as part of a clampdown on drug activity in Letterkenny.
Uniformed Gardai and detectives were part of the raids, carried out as part of Operation Thor.
During the operation four properties were searched under warrants and six persons were arrested.
Those arrested included three men and three women, with their ages ranging from late teens to early 40s.
A number of mobile phones and documents were seized and officers also seized a small amount of cash.
One person, an 18-year-old male, was charged in relation to the operation and brought before Letterkenny District Court yesterday, and was released on bail.
Five persons were detained under Section 4 of the Criminal Justice Act, 1984 at different Garda stations in Donegal.
They have all since been charged in relation to this operation and are due to appear before Letterkenny District Court today.
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