At approximately 20:00 GMT+2 on December 13th, tens of people attacked the Exarcheia police station with stones and molotovs, while also attacking some of the police cars (marked and unmarked) parked outside. No-one was injured during the attack.
In retaliation, at the time of writing, police forces have encircled and are raiding the Exarcheia neighbourhood, with riot police (MAT) and motorcycle police (DELTA) having entered the square.
UPDATE, 21:02 Approximately 20 people have been detained by the police so far, according to reports.
More info as it comes.