Spanish authorities have arrested four alleged members of a hacktivist group believed to have carried out cyberattacks targeting government ministries, political parties, and various public institutions.

The group, which called itself “Anonymous Fénix” and claimed they were affiliated with the Anonymous hacker collective, conducted distributed denial-of-service (DDoS) attacks against targets in Spain and several South American countries, according to the Spanish Civil Guard.

The first attacks occurred in April 2023 and peaked after the flash floods that struck Valencia in late October 2024, when the group’s members attacked multiple government websites, claiming Spanish authorities were responsible for the deaths and destruction caused by the storm.