Parties to a conflict shall at all times distinguish between the civilian population and combatants in order to
spare civilian population and property. Neither the civilian population as such nor civilian persons shall be the
object of attack. Attacks shall be directed solely against military objectives.”
Artikel 7, INTERNATIONAAL HUMANITAIR OORLOGSRECHT
http://www.icrc.org/eng/resources/documents/mis…
(1) Persons taking no active part in the hostilities, including members of armed forces who have laid down their arms and those placed hors de combat by sickness, wounds, detention, or any other cause, shall in all circumstances be treated humanely……
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To this end the following acts are and shall remain prohibited at any time and in any place whatsoever with respect to the above-mentioned persons:
(a) violence to life and person, in particular murder of all kinds, mutilation, cruel treatment and torture;