Confusing title, both the original and the one here on HN.

Three french supermarket chains had their refrigeration systems hacked.

Separately, a super market chain serving Belgium and the Netherlands shut down a large chunk of their IT systems due to a "cybersecurity incident", primarily affecting distribution centers and grocery delivery services. But the supermarkets are currently open, and do not have refrigeration issues.

Suspicious timing and these incident could well be related, but that has not been reported so far.

It could well be one ransomware attack on Ahold Delhaize, and an unrelated attack on a refrigeration supplier. Note that a similar refrigeration attack happened happened to a number of US military installations a few weeks ago.