A 42-year-old Russian was arrested in Thessaloniki by officers of the anti-terrorist-Sub-Directorate for Combating Special Violent Crimes of Northern Greece, a police announcement said on Wednesday morning.

The police arrested the Russian prankster who caused chaos in "Eleftherios Venizelos" Athens airport and six hospitals in Attica on Tuesday morning.

A case file was filed against him for terrorist acts, spreading fake news, disrupting the operation of a critical service, disturbing the peace of citizens and attempting to obstruct transportation.

For the time being, the motive of the 42-year-old Russian, who in the emails had references to Islam and threatened that "blood will be spilled" remains unknown.