The UK’s National Crime Agency arrested a man in West Sussex in connection with a ransomware attack that caused significant flight delays last week and forced many airlines to check passengers and luggage manually. The cyberattack impacted several airports across Europe, including London’s Heathrow and Berlin’s Brandenburg. The agency shared little about the arrest in its announcement today other than that the target was “a man in his forties” and that he was released on conditional bail as the investigation progresses.

The attack targeted the Multi-User System Environment (MUSE) used by airports, a piece of software developed by Collins Aerospace which allows multiple airlines to share a single check-in desk. While some larger airlines like British Airways were able to switch to a backup

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