ATHENS, Greece - Authorities say masked youths have attacked the Greek riot police headquarters in Athens, causing damage but no injuries.
Police say a group of 30 youths threw petrol bombs and stones at the building, damaging police vehicles parked outside. The central Athens building is also used by traffic police.
In other parts of Athens on Tuesday, schoolchildren are blocking streets to protest against the police killing of a 15-year-old boy on Dec. 6, which sparked a week of the country's worst riots in decades.
Dozens of teenagers gathered outside the capital's main court complex and a maximum security prison, stopping traffic but causing no other disturbance. Similar protests are planned in other parts of town later in the day.
