There was a false alarm at the Irish embassy, when Italian police were called to open a package which resembled a suspicious package linked to those sent to the Swiss and Chilean embassy yesterday.
The package turned out to contain a greeting card.
The Minister for Foreign Affairs Micheál Martin, TD, has ordered a review of procedures for handling post at all Irish embassies across the World.
Italian police have been on high alert and have been searching embassies in Rome following the parcel bomb attacks on the Swiss and Chilean embassies in the city yesterday.
Two people were injured in the blasts; doctors say one of them could lose their sight in one eye.
An Italian anarchist group has claimed responsibility for the attack.
The FAI, or Informal Anarchist Federation, said: 'We have decided to make our voice heard with words and with facts, we will destroy the system of dominance, long live the FAI, long-live Anarchy.'
In December 2009, the group claimed responsibility for a bomb that partially exploded in a tunnel under Milan's Bocconi University at 3am, causing no casualties.
Italian Foreign Minister Franco Frattini condemned the incidents, which he said were a serious threat to diplomatic missions in Rome. He urged caution and warned against alarmist reactions.