DUBLIN, March 22 — A suspicious parcel discovered at a postal sorting office in the western Irish county of Limerick appears to be identical to letter bombs sent to buildings in London and the University of Glasgow this month, Irish police said today.

Police said they were investigating the parcel identified at the sorting office shortly after 0600 GMT today and were liaising with British authorities. The army’s bomb disposal team was on the scene.

A dissident Irish nationalist group calling itself the "IRA” claimed responsibility for the letter bombs sent to London and Glasgow. The small group is made up of militants opposed to Northern Ireland’s 1998 peace deal. — Reuters