Australia's Medibank warns that hacker may release more data

FILE PHOTO: An illuminated sign is seen outside a branch of the Australian health insurer Medibank Private in Sydney October 20, 2014. REUTERS/David Gray/File Photo

SYDNEY (Reuters) -Australia's biggest health insurer Medibank Private Ltd, recently hit by a massive cyber hack, said on Wednesday the hacker could release more stolen data after the company refused to make ransom payments.

Some names, addresses, phone numbers, email addresses, passport numbers of international students and health claims data stolen from Medibank's systems have already been released on a dark web forum, the company said in a statement.