RTBF reports (translation):
This weekend, hackers managed to render data on local servers unusable.
In a statement, Albert Mabille, the mayor of Floreffe, said:
On Saturday we noticed that there was a problem and then we filed a complaint directly with the police. We also requested the support of specialized services. They have not been stolen but they have been encrypted which means that they have become unusable. We do not have any activity that has a transfer external data. They are terabits of data that should have been transferred which takes a long time.
Read more on RTBF.
Note: The story does not call it a ransomware attack but it sounds like it was.