Australia's Optus says up to 10 million customers caught in cyber attack

A woman uses her mobile phone as she walks past in front of an Optus shop in Sydney, Australia, February 8, 2018. REUTERS/Daniel Munoz/File Photo

SYDNEY (Reuters) - Australian No. 2 telco Optus, owned by Singapore Telecommunications Ltd, said it will contact up to 10 million customers whose personal details were taken in a "sophisticated" hack, but added no corporate clients were compromised.

Optus chief executive Kelly Bayer Rosmarin said she was angry and sorry that an offshore-based entity had broke into the company's database of customer information, accessing home addresses, drivers licence and passport numbers in one of the country's biggest cybersecurity breaches.