According to the BBC, two other flights were diverted Thursday following similar alerts: a Wizz Air plane from Milan to Warsaw, which was diverted to Vienna; and a Ryanair flight from London to Sofia, which was diverted to Plovdiv, Bulgaria.

Finnish carrier Finnair said that two of its aircraft — both departing from Helsinki and bound for Rome and Vienna — faced "faced unfounded or hoax bomb threats" and were subject to police checks after landing. The plane bound for Rome was also escorted by Italian fighter jets.

"Unfortunately, air traffic is sometimes subject to threats, as we have seen this week, when also other airlines in Europe have faced hoax bomb threats," said spokesperson Päivyt Tallqvist.

Another bomb threat affected a flight operated by LOT from Warsaw to Brussels Airport on Thursday morning. Airport spokesperson Ihsane Chioua Lekhli told Belgian newspaper Het Nieuwsblad that police carried out searches and no further security measures were deemed necessary.

LOT said that another aircraft scheduled to fly from Warsaw to Paris “was stopped while taxiing and directed to a designated parking stand” before departure.

“The aircraft and all baggage underwent a security screening,” said the airline, which added that no hazardous items were found and that the flight departed with a replacement aircraft.