Russian hacktivists say they were behind freezer hacks, but speculation remains

Two Russian hacktivist groups have claimed they worked together on the waves of freezer hacks which have affected European supermarkets.

But their posts and channels have now been deleted and their claims are being met with some scepticism.

Cyber-security researchers at multiple firms are pouring over evidence gathered from so-called "honeypots" to provide clues as to who is behind the waves of freezer hacks.

While Russian groups are not being ruled out, experts say Iranian hacktivists or nation state hackers - or even teenagers pulling pranks - could also be the culprits.

Three separate cyber-security firms have deployed fake freezer software traps to monitor how hackers attempt to use them for attacks.