Qantas told the Financial Times it was investigating whether the Scattered Spider cyber criminal group was behind the attack. The strike comes days after the FBI warned there were signs the group had started to target the global airline sector.

Cybersecurity experts are warning Qantas customers to remain vigilant to scams and hacking attempts in coming days, after as many as 6 million Australians were caught up in a data breach. Here's what we know about the data stolen,

Australian airline Qantas says a data hack on Monday exposed the personal information of six million customers and it expects the amount stolen to be “significant.”