Attackers splashed paint at the entrance of the residence of US Ambassador in Athens, Geoffrey Pyatt, early on Wednesday.
The members of the group drove up to the residence on five motorcycles and fled immediately after the incident.
Rubicon anarchist group claimed responsibility for the attack.
The Athens Macedonian News Agency reports that police have detained nine suspects, and the Greek Foreign Ministry has condemned the attack.
The Ambassador posted the following tweet:
Kalimera, I woke up to more childish vandalism this morning outside the residence and will continue to work with Greek authorities to punish the culprits according to law. Destruction of property is not peaceful protest.
— George J. Tsunis (@USAmbassadorGR) May 15, 2019
