A week-long curfew aimed at stopping a rise in coronavirus infections was imposed in the regional units of Achaia, Ilia and the island of Ikaria on Friday.
The curfew applies from 1 a.m. to 6 a.m., except for night workers and health emergencies.
The measures also foresee the around-the-clock prohibition of music at bars and restaurants and other entertainment venues.
The measures are valid through to September 10, and will be re-evaluated by the National Committee of Public Health.
Authorities also decided to extend similar restrictions in the regional units of Messinia and Iraklio.