A serious hack attack on Israel's electricity authority has "paralysed" computers and led to a partial grid shutdown - as the country's temperatures plunged.
The "severe" breach was detected on Monday as temperatures dropped to below freezing, leading to two days of record-breaking energy consumption.
Energy minister Yuval Steinitz said it is one of the biggest computer-based attacks ever experienced, and portions of the electricity grid were shut down as a response.
He did not identify any suspects behind the attack or give details about how it was carried out.
The problem has not yet been solved, but computer technicians are working to fix it.
Mr Seinitz added: "We are handling the situation and I hope that soon, this very serious event will be over … but as of now, computer systems are still not working as they should."
On Tuesday Prime Minister Benjamin Netanyahu said: "The greatest curse that we face is that in the Internet of Everything, everything can be penetrated.
"Everything can be sabotaged. Everything can be subverted. And when I say everything, I mean everything."
The attack comes five weeks after Ukraine's power grid was successfully hit in what is believed to be the world's first hacker-caused power outage.
It is still unclear whether malware known as BlackEnergy was the direct cause of the blackout, but at least three regional power authorities were affected by the malicious software package.
Researchers say that the because the attack was so sophisticated, it may have had the backing of another state.
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