An “extremely significant” car bomb has been intercepted in transit near the Irish border in an operation targeting dissident republicans, Gardaí said. In an intelligence-led swoop, members of the Garda’s Special Detective Unit stopped the vehicle travelling on the N2 south of Carrickmacross, Co Monaghan on Wednesday afternoon.

Gardaí then requested the assistance of the Irish Defence Forces EOD (Explosive Ordnance Disposal) team, which completed an examination of the vehicle. It is understood the device found contained suspected military grade explosives. Garda sources have described the bomb as “highly sophisticated” and “advanced”. The vehicle’s female driver, aged in her 20s, was arrested at the scene and remained in Garda custody on Friday. Another suspect, a man aged in his 40s, has since been arrested and is being held at a Garda station in the Dublin area. Garda Commissioner Justin Kelly confirmed details of the operation as he spoke to media at a Garda graduation event in Co Tipperary on Friday.

“To be clear, what we found was an extremely significant seizure,” he said. “So this was an explosive device.”

Commissioner Kelly added: “Any seizure of this nature is really concerning.

“However, we certainly know that there are a small minority of dissident republicans who did not agree with the Good Friday Agreement, they did not put weapons and explosives (out of use), they didn’t, you know, go through with the proper process in relation to decommissioning.

“So that is something that we continue to deal with.

“There’s a small minority of these individuals, I would describe them as radicalised republicans, and this is a threat that we’re going to continue to face for some time in An Garda Síochána.

“We work very closely with our colleagues in PSNI (Police Service of Northern Ireland) and the intelligence services in the UK to deal with this threat.

“But I want to commend the members of An Garda Síochána who are involved in

Garda Commissioner Justin Kelly indicated that the bomb was already constructed when it was seized.

“Unfortunately for operational reasons, I can’t go into the exact detail of the device,” he said.

“But what I will say certainly it was a significant explosive device. So certainly not just the seizure of components or pieces.