A man has been question in relation to the discovery.
Cigarettes and cash worth €40,000 have been seized by Revenue.
Three properties in Roscommon were searched on Wednesday and cash to the value of €30,000 and over 14,000 cigarettes were discovered.
Ballinasloe District Court granted Revenue Officers a three-month cash detention order by a Judge.
A man has been questioned in relation to the incident.
Investigations are ongoing.