Six men arrested by police investigating the activities of dissident Republicans will appear before Dublin's Special Criminal Court tomorrow.
The six, all suspected of being members of the hardline Real IRA, will be charged before the court.
A seventh man, who was also arrested in the police raid on a house in Dundalk, Co Louth, has been released without charge.
In his case a file was being prepared for the Director of Public Prosecutions for a decision on whether to proceed.
The men are aged between 21 and 51 and are all from the Co Louth area.
Security sources said the arrests, involving armed officers from the Special Detective Unit, were a "significant" development in the fight against Republican terrorism.
Six of the men were arrested inside the house and a seventh was taken from a van outside.
A number of weapons and paramilitary-style clothing were also seized.
The men are currently being held at different Garda stations across Counties Louth and neighbouring Meath.
They will be formally charged at the Special Criminal Court .