Spanish police have arrested a 16-year-old suspected of being the main operator of the KillSec ransomware group, with law enforcement across Europe seizing its servers and 110 terabytes of stolen data. Investigators are also tracing the proceeds of ransoms the group demanded in cryptocurrency. A second suspect, a Dutch national arrested in Britain, faces extradition to Puerto Rico on charges related to the group's activities. Europol stated the group, active since 2024, used AI to build its infrastructure and identify victims, employing double extortion tactics.