Kildare gardai raided a house in Main Street in Newbridge on October 1 last and found drugs and cash to the value of €500.
Gardai searched the premises under warranty and found a quantity of cannabis, diamorphine and cash to the value of €500.
The investigation is ongoing.
SEE ALSO: Quad bike stolen from Monasterevin
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.