QUICK TAKE | How Did Hoax Bomb Threats Disrupt Flights Across Europe? Seven Things to Know

1. How widespread were the threats?

The BBC reported that at least 21 aircraft and several airports were targeted in Thursday’s wave. Similar threats had already disrupted flights earlier in the week. Counts varied across reports, with some tallying Thursday’s alerts and others counting disruptions over several days. No explosives were reported found.

2. Why did a flight to Rome land at a French air base?

Aer Lingus flight EI402 from Dublin was diverted to Évreux, west of Paris, as a security precaution. French military aircraft escorted it and it landed safely. The airline then had to arrange onward travel for passengers whose destination was Rome.

3. Did every threatened flight divert?

The response varied. Italian fighter jets escorted a Finnair flight from Helsinki into its scheduled destination, Rome, where specialists checked it. A Ryanair flight from London Stansted to Sofia landed in Plovdiv instead. Bulgarian military aircraft escorted it and two other targeted flights.

4. What happened at Heathrow and Birmingham?

Both British airports received threats that were assessed as lacking credibility. In Prague, police met easyJet flights from Newcastle and Glasgow as a precaution. Those cases show the range of responses available, from assessing an alert on the ground to meeting an aircraft after landing.

5. Who decides how seriously to take an alert?

Airlines and security authorities assess the threat and decide what precautions to take. The response can include a search at the scheduled destination, an unscheduled landing or a military escort. Investigators and security teams may then need to inspect the aircraft and baggage.

6. Do authorities know who sent the threats?

Rome airport authorities said threats against two inbound flights arrived by email. Prague airport also reported messages from anonymous addresses. Some messages carried a purported group name. Authorities had yet to establish who was responsible or whether the incidents across Europe were linked.

7. Why can a hoax disrupt flights hours later?

A diversion leaves an aircraft and crew at the wrong airport. Searches can require passengers and bags to come off before the plane can fly again. Passengers miss connections, airlines arrange onward travel, and the same aircraft may be late for its next scheduled departure.