Greek militants have warned of new protests after an attack on an Athens police station in the latest clashes over the police killing of a teenager.

About 100 protesters attacked a police station where two officers accused over the December 6 death of 15-year-old Alexis Grigoropoulos are based.

The police station is near the Exarchia district where the shooting took place and where Athens Polytechnic student protest leaders met on Sunday (local time) to plan new action.

Pamphlets announced rallies at the Athens police headquarters on Monday (local time) and at parliament square on Thursday, while students in Thessaloniki distributed manifestos via motorbike.

The new unrest erupted after vigils were held to mark the week since Alexis Grigoropoulos's death and triggered a wave of violence with banks targeted and a late-night standoff between riot police and youths outside parliament.

Greece's constitution bans police from entering educational establishments, a legacy of a crackdown on a 1973 student protest against the then military dictatorship in which 44 demonstrators were killed.

The week of protests have reignited radical groups against Greece's right-wing government.

A Sunday poll suggested most Greeks see the violent protests as a "popular uprising," not driven by "minority activists."

Of those questioned, 76 per cent were "dissatisfied" with the police response while just 20 per cent approved of Prime Minister Costas Karamanlis's handling.

-AFP