6.- (2) In Articles 7 and 8 references to murder shall be construed as references to the killing of a person in such circumstances as would, if committed in the State, constitute murder.
2. For the purpose of this Statute, ‘war crimes’ means:
(e) Other serious violations of the laws and customs applicable in armed conflicts not of an international character, within the established framework of international law, namely, any of the following acts:
(ix) Killing or wounding treacherously a combatant adversary;