Overwhelmed with relief, passengers arrived safely in Paris today, some crying as they embraced loved ones.
The hoax, the fourth against Air France in recent weeks comes amid heightened concerns about extremist violence in many countries.
France has been on high alert for terrorist activity and in a state of emergency since Islamic extremist attacks Nov. 13 in Paris killed 130 people. The Islamic State group claimed responsibility for those attacks and for downing a plane carrying Russian tourists out of Egypt in October.
Air France filed a reckless endangerment lawsuit, spokeswoman Ulli Gendrot said Monday. It does not name a particular perpetrator, but leaves it to investigators to determine who might eventually stand trial.
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Six passengers were being questioned Sunday, including the person who informed the crew about the device, said a Kenyan police official who is part of the investigation and who insisted on anonymity because he is not authorized to speak to the press.
"I really admired the crew, because they thought it was a real bomb and they remained very serene," said Antoine Dupont of the northern city of Lille.