Qantas Airways has revealed that a cyber breach exposed the personal information of 5.7 million customers, including phone numbers, birth dates, and addresses for over a million individuals. The airline is actively monitoring the situation and has implemented additional security measures.

A cyber criminal has made contact with Australia's Qantas following a data breach last week that exposed personal information of six million customers, a company spokesperson told Reuters on Tuesday.

Qantas received an extortion attempt following the cyberattack and data breach at one of the Australian airline's call centers.