EU cyber security service (Enisa) confirmed that ongoing problems in European airport automatic check-in systems are due to redemption attack (ransomware), which started on Friday.

According to an ENISA announcement, “law enforcement principles are working to investigate” the attack, which is characterized by the data lock until the victim pays ransom to restore access. The service did not mention the origin of the attack, but stressed that the competent authorities have already begun investigations.

It is noted that it was confused earlier on the type of cyberattack, but with a new announcement, Enisa confirmed that it was a liberalism, which is responsible for the problems observed on Friday.

Hackers have managed to put out the automatic check-in systems provided by Collins Aerospace, a company that manages passenger registration and control systems at many European airports. The result was to disturb the operation of large airports, such as Heathrow in Britain – Europe’s most crowded – but also Brussels and Berlin.

Many of Europe’s largest airports still face malfunctions. In particular, Berlin Airport operates with obstacles, and today is expected to receive more than 92,000 travelers – a significantly increased number due to the marathon held the previous day in the German capital.