A number of civil liberties groups have expressed concern about the new security measures being considered by both London and Dublin in the wake of the bombing.
Mr Martin O'Brien of the Belfast-based Committee on the Administration of Justice said: "Our experience has been that the use of emergency powers has helped to perpetuate rather than resolve the conflict."
Mr Michael Farrell, of the Irish Council for Civil Liberties, said governments "need to be sure that their response is in conformity with internationally-protected human rights".
The Northern Ireland Women's Coalition welcomed the "broad thrust" of the measures.
