Seven handguns have been seized following a search in Dublin.
The weapons - six semi-automatic pistols as well as magazines and a revolver - were discovered last night concealed on open ground in the west of the city.
Gardaí say they belonged to an organised crime gang.
The weapons are being forensically examined to see if they can be linked to shootings or murders or if fingerprints or DNA can be found on them.
Gardaí say they are in good condition.
The discovery was made as part of an investigation by the Garda Drugs and Organised Crime Bureau.
The head of Special Crime Operations, Assistant Commissioner John O'Driscoll, said: "The undertaking of this operation leading to the discovery of a significant quantity of firearms reflects the Garda Síochána's unrelenting efforts in tackling serious and organised crime and our determination to keep people safe from those who would use firearms to endanger life."
No arrests have been made.