Six European passenger planes were forced to land following a series of suspected bomb threats that were separately called in on Thursday morning.
Earlier in the day, French Prime Minister Sebastien Lecornu's Office stated that an Airbus A320 plane flying from Dublin to Rome was diverted to France's Evreux airbase after a bomb alert.
The Prime Minister's office is monitoring the situation, it added.
According to flight-tracking website Flightradar24, the Aer Lingus aircraft turned near Paris and was circling over the Evreux area after declaring an in-flight emergency.
Rome Fiumicino Airport (FCO) has reportedly been temporarily closed due to the bomb threat.
Five other planes diverted
Just over an hour later, five other planes were diverted.
Three aircraft were forced to land at Bulgarian airports following bomb threats, local media reported on Thursday, citing government ministers.
Two of the aircraft, flying from Copenhagen and Madrid, respectively, landed in Sofia, broadcaster bTV reported, citing the interior minister, while NOVA TV cited the transport minister.
A third aircraft from London landed in Plovdiv, the reports said.
Separately, a spokesperson for Finnish carrier Finnair said on Thursday that one of its flights to Rome had landed as normal after receiving a bomb threat.
This is a developing story.