A violent attack on the head of Greece’s largest private-sector workers’ union, Yiannis Panagopoulos, as he was preparing to speak during a protest on Friday against the government’s austerity measures, is to be investigated by high-ranking Attica police detectives. A police statement released on Saturday gave no details about whether any suspects had been questioned in connection with the attack, which left GSEE chief Panagopoulos with two cracked ribs and extensive bruising. The police also explained the circumstances that led to World War II resistance hero Manolis Glezos being sprayed in the face with tear gas during protests in front of the Tomb of the Unknown Soldier. They said a group of protesters had attempted to use force to free a suspect who had been detained for attacking officers with a piece of wood. Glezos, 87, was apparently caught up in the group of these protesters.