The incidents come after some 10 European flights were targeted by bomb threats on Tuesday, forcing the brief closure of a Warsaw airport and the scrambling of air force planes in Rome.
An airliner heading from Dublin to Rome was on Thursday rerouted to France, where it was escorted by military aircraft after a suspected bomb threat, French authorities said.
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The situation is being monitored, a statement from French Prime Minister Sébastien Lecornu’s office said.
France's air force said it had dispatched planes "as soon as the threat was reported".
"The aircraft has landed safely at Évreux. The 151 passengers and 6 crew members have been brought to safety, and bomb disposal teams are on-site," Lecornu said.
Flight tracking websites say the diverted aircraft belongs to Ireland's flag carrier, Aer Lingus.
Italian media said that bomb alerts were reported on two flights to Rome and from Milan. A flight from Helsinki headed for the Italian capital landed safely escorted by Italian jets.
The Flightradar24 tracking site says no flights have taken off from Rome Fiumicino Airport, adding that the reason for the "disruption is currently unknown."
A spokesperson for Finland's flag carrier Finnair said a bomb threat was also made against a flight from Helsinki to Vienna operated by Jettime but that the aircraft landed in the Austrian capital without incident.
Czech police said four flights heading to Prague have all faced bomb threats and that airport authorities are preparing for their landing.
Meanwhile, authorities in Bulgaria said that bomb threats had been made against three Ryanair flights headed to the capital Sofia on Thursday.
Two of the planes, which took off from Copenhagen and Madrid, reached Sofia while a third aircraft from London was diverted to Plovdiv, the transport ministry said.
The incident came after some 10 European flights were targeted by bomb threats on Tuesday, forcing the brief closure of a Warsaw airport and the scrambling of air force planes in Rome, according to authorities.
The UK government called those incidents "malicious hoax threats".
This is a developing story and our journalists are working on further updates.