Seems like it was not strictly climate related in this case.
https://paris-luttes.info/communique-sur-l-affaire-de-la-145...
Looks like your run of the mill radical left occupation of housing (the stuff you see in big European cities like Berlin and Paris where they have that tradition).
Their bouts with law enforcement trying to evict them could be the reason for the arrests. If the google translate is not completely misleading then they refused to give their names or fingerprints when initially arrested.
