Those who were taken into custody are said to be affiliates of the Egregor group, with some being providers of logistical and financial support.
The report said the operation had been kicked in the western autumn last year after a number of reports were made to Europol.
This is the second case in 2021 of law enforcement authorities going after ransomware operations.
In January, the FBI took down the site of the Windows ransomware NetWalker on the dark web and also arrested a Canadian who was using the malware for attacking companies.
Contacted for comment, Brett Callow, a ransomware researcher with New Zealand-based Emsisoft, said: "More success! This may well have a broader impact as enforcement action undoubtedly serves as a deterrent.
"For example, after NetWalker’s operation was disrupted, another group decided to cease operations citing that as the reason and handed us their keys, enabling us to create a decryptor to help past victims."