Passage 6.9.6
τῇ δὲ Ὀλυμπιάδι τῇ πρὸ ταύτης Κλεομήδην φασὶν Ἀστυπαλαιέα ὡς Ἴκκῳ πυκτεύων ἀνδρὶ Ἐπιδαυρίῳ τὸν Ἴκκον ἀποκτείνειεν ἐν τῇ μάχῃ, καταγνωσθεὶς δὲ ὑπὸ τῶν Ἑλλανοδικῶν ἄδικα εἰργάσθαι καὶ ἀφῃρημένος τὴν νίκην ἔκφρων ἐγένετο ὑπὸ τῆς λύπης καὶ ἀνέστρεψε μὲν ἐς Ἀστυπάλαιαν, διδασκαλείῳ δʼ ἐπιστὰς ἐνταῦθα ὅσον ἑξήκοντα ἀριθμὸν παίδων ἀνατρέπει τὸν κίονα ὃς τὸν ὄροφον ἀνεῖχεν.
In the Olympiad preceding this, they say Kleomedes of Astypalaia, boxing against Ikkos, a man from Epidauros, killed Ikkos in the match. After the judges declared his actions illegal and stripped him of his victory, Kleomedes, driven mad by grief, returned to Astypalaia. There, entering a school, he overturned the pillar supporting the ceiling, crushing about sixty children.