There is no media report about any dead police officer in the clash between the protesters and the Greek police.
But there are two confirmed reports about two Greek unarmed kids being killed by the Greek police.
There is no doubt that after the death of a police officer in the clash between the Anarchists and the police, things will be totally different.
In the last days I browsed some Internet sources and it seems that the Greek Youth Uprising has no direct organizational relation with any Anarchist Group. Most sources say that the protesters are huge crowds of Greek students accusing the Conservative Government of giving them bullets instead of social and sustainable support.