A building housing Attiki Odos offices at exit 4 of the motorway was attack by a group of individuals wielding sledgehammers in the early hours of Tuesday morning.
According to police, the unknown individuals damaged offices and a company vehicle before taking flight.
Police sources said that eight people have been detained and taken to the police headquarters in Athens in connection with the incident.
Late on Monday night, meanwhile, members of Rouvikonas threw fliers outside the offices of the civil protection agency on Kifissias Avenue.
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