A police officer, who spoke on condition of anonymity because he is not allowed to brief media on details of an ongoing investigation, told The Associated Press that police consider the arrested individual the mastermind of the escape.
The escape from the Trikala Holding Facility west of Larissa occurred Friday evening. It involved outsiders attacking the prison with machine guns and hand grenades. Two guards were injured, one seriously; he is still in intensive care.
All 11 escapees are Albanian nationals. Two were caught Saturday. All of the escapees were convicted of crimes such as armed robbery.