Hackers raised temperature settings at three French plasma cold-storage sites overnight between 1 and 2 November.

France's national blood service, EFS, said the attack came through a refrigeration supplier, Coolworld, not its own systems.

An on-call technician saw temperatures climbing and raised the alarm. Staff moved the plasma to safety before any products were harmed.

EFS said no blood products were lost and no health consequences were identified. Collection and supply to over 1,900 hospitals continued.

Some reports put a new setpoint as high as 110 degrees Celsius against a normal of about minus 30. Officials have not confirmed that figure.

The incident follows a wider wave of refrigeration attacks on European supermarkets that spoiled food in nearly a dozen countries.

France's cybersecurity agency and the Health Ministry are investigating. Sites in Bourgogne-Franche-Comte were among those named in press reports.

This is the first healthcare target reported in the refrigeration attack wave. Fresh frozen plasma must stay at or below minus 25 degrees Celsius.

Read the full report on the French blood bank hack on Trends News Stories.

Stay on top of breaking news in WhatsApp. Join TrendsNewsStories. Tap Join WhatsApp below.