(Reuters) -Optus, the Australian unit of Singapore Telecommunications, said Thursday it was investigating a data breach that could have exposed personal information, including customers’ home addresses, passport numbers and phone numbers.
Local media reported that up to 9 million customers were affected by the cyber attack.
Reuters was unable to personally verify the number, as Optus did not immediately respond to a request for comment.
Optus said it immediately stopped the attack after discovering it, and that payment information and account passwords had not been compromised.
The company’s services, including mobile internet and home internet, will not be affected and messages and voice calls will not be affected, it said.
“Optus services remain safe to use and operate as normal,” the company said in a statement, adding that it has notified the Australian Federal Police and other key regulators of the breach.
(Reporting by Tejaswi Marthi in Bengaluru; editing by Devika Syamnath)