Police yesterday were examining the car of Christos Polyzogopoulos, the head of Greece largest umbrella union, in the hope of finding fingerprints that might lead them to the youths who attacked him. Polyzogopoulos, the president of the General Confederation of Greek Labor (GSEE), and one of the heads of GSEE’s labor institute, Savvas Robolis, were attacked and severely beaten by a group of some 15 suspected anarchists on Tuesday night in Exarchia, central Athens. The two men were in a stable condition yesterday. Police sources said that several people were detained in connection with the incident but no arrests were made. The attack was roundly condemned by union leaders and politicians yesterday. GSEE issued a statement labeling it «murderous,» claiming that up to 40 youths were involved in the incident. It called for a protest outside Parliament this morning. The youths also stole Polyzogopoulos’s mobile phone and made threatening calls to several politicians whose numbers they found in its directory.