An international coalition of American, French, Ukrainian, and European Union (EU) law enforcement authorities coordinated on the arrest last week of two individuals and the seizure of millions of dollars in profit allegedly involved with a spree of damaging ransomware attacks.

Europol, the EU’s law enforcement agency, on Monday announced the arrests on Tuesday in Ukraine of the unnamed individuals alleged to have been behind ransomware attacks that extorted between 5 million to 70 million euros.

Authorities say the two began carrying out a series of “prolific” ransomware attacks in April 2020 against industrial groups in both Europe and North America, encrypting files and threatening to release stolen data online if the victims did not pay the ransoms demanded.

In addition to the arrests, authorities carried out seven property searches that resulted in the seizure of $375,000 in cash, two six-figure luxury vehicles and the freezing of $1.3 million in cryptocurrencies.