Unknown individuals attacked early Sunday a riot police (MAT) squad and motorcycle police (DELTA) squad in the Exarchia district in downtown Athens.  In the first incident individuals threw two makeshift firebombs against the MAT squad, which exploded on the street without causing any injuries. At the same time thirty persons attacked a DELTA squad in downtown Athens and threw five firebombs as well as stones at the policemen. A police officer was lightly injured in the hand.