Over 80,000 euro worth of herbal cannabis has been seized in Athlone.
The discovery was made as part of routine operations at a premises in the town on Monday.
It's understood the package originated in Spain and was destined for Dublin.
The drugs were discovered, with the help of detector dogs Bailey and Sam and Revenue say investigations are ongoing.
Meanwhile Revenue officers examining parcels at two premises in Dublin, seized illegal drugs worth over €370,000, including almost 18kgs of herbal cannabis.
Small quantities of butane honey oil, cannabis resin, MDMA, ecstasy tablets, cocaine and synthetic cannabinoids were also seized.
The illegal drugs were discovered concealed in parcels that originated in North America, Europe and the United Kingdom and were labelled as ‘tuxedos’, ‘tea’, ‘board games’, ‘jeans’, ‘car organisers’ and ‘pet blanket’.
Some of the parcels were destined for Leitrim.