Ireland's police chief has backed British intelligence warnings that the dissident Republican terror threat is at its highest for years.
Garda Commissioner Fachtna Murphy vowed his force was committed to thwarting the actions of terrorists, particularly those intent on assassinating officers in Northern Ireland.
M15 and British Home Secretary Theresa May last week warned dissidents could attempt to mount a new wave of terrorist attacks on the British mainland, raising the threat level to substantial.
"I very much agree with that assessment," said Commissioner Murphy.
"We share information, we share intelligence, and based on knowledge that I have, that is the proper assessment and I support the work of the security services."
The Commissioner said Garda officers and the Police Service of Northern Ireland (PSNI) were countering the activities of a small group of people - including members of the Continuity IRA, the Real IRA and Oglaigh na hEireann.
So far this year 22 suspects have been brought before the Special Criminal Court in Dublin to face charges relating to dissident republican terrorism.
Elsewhere, the Real IRA has publicly threatened to target banks and other financial institutions in the City of London, accusing them of financing Britain's colonial and capitalist system.
Justice Minister Dermot Ahern said the dissident threat remained severe and significant.