Australian police say they have identified the Russian cyber-criminals holding the medical data of millions to ransom.
Hackers are demanding a dollar for each of the 9.7m sensitive records stolen from the medical insurer Medibank.
The hackers have published sensitive documents online including abortion records in an episode described in parliament as “morally reprehensible”.
In a news conference, police warned hackers: “We know who you are”.
Australian Federal Police Commissioner Reece Kershaw told reporters that police believe the hackers are in Russia but did not provide any evidence.