The cache was found during searches in Louth and Meath A machine gun, an improvised mortar, assorted ammunition and bomb-making equipment have been found by Irish police in Counties Louth and Meath.
The find was made by gardai during searches targeting dissident republican activity in the area.
Garda commissioner Fachtna Murphy has described the find as “significant”.
“This find represents a further step in our determined strategy to target, disrupt and detect the activities of dissident republicans,” he said.
“We continue to work closely with our colleagues in the Police Service of Northern Ireland and in the Security Service to thwart the intent of a small group of people who want to inflict violence and pain on communities.
“Our objective is to stop them in their tracks and secure evidence to put them before the court.”
This article is from the BBC News website. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.