The Greek police have detained over 150 people in a series of raids ahead of the anniversary of the killing of a teenage boy by a policeman that sparked riots last year, Press TV reported.
Two cars went up in flames in the Athens district of Exarchia, where 15-year-old Alexis Grigoropoulos was gunned down by a policeman on December 6 last year. His death fuelled weeks of violence across Greece.
Twelve people, including five Italians and three Albanians, were arrested for the attack on the cars, while 81 more people were taken in from the surrounding area for questioning, a police source said.
Riot police stormed a town hall in the Keratsini district after it was briefly occupied, detaining 41 people.
In a separate raid in the western district of Keratsini, police detained another 20 people in a suspected anarchist hideout.
The police said they found two petrol canisters, sledgehammers, and thirteen gas masks on the premises.
Thousands of people are expected to march through Athens on Sunday after a religious service at the grave of Grigoropoulos in the suburb of Palio Faliro.
Foreign demonstrators are also expected to travel to Greece for the commemoration.
The policeman accused of killing the teenager has been charged with homicide and is scheduled to go on trial on January 20.