Australian carrier Qantas?on Wednesday (2 July) confirmed?a cyber attack at one of its contact centres?that has compromised the personal data of six million customers.

In a statement, the carrier said it had detected unusual activity on Monday on a third-party platform used by a Qantas airline contact centre.

The breach, it said, has since been contained but not before the service records of six million customers were leaked.

This includes customer names, email addresses, phone numbers, birth dates and frequent flyer numbers, the carrier said, adding that credit card details, personal financial information and passport details are not held in this system.

No frequent flyer accounts were compromised, the carrier said following an initial investigation, nor have passwords, PIN numbers or log in details been accessed.

¡°We are continuing to investigate the proportion of the data that has been stolen, though we expect it will be significant,¡± Qantas said.

¡°There is no impact to Qantas¡¯ operations or the safety of the airline,¡± the carrier added.

The incident comes after the US Federal Bureau of Investigation last week warned that cybercrime group?Scattered Spider?was targeting airlines after both Hawaiian Airlines and Canada's WestJet reported breaches. Qantas did not name the suspected group behind the attack.

¡°While we conduct the investigation, we are putting additional security measures in place to further restrict access and strengthen system monitoring and detection,¡± the Qantas said.