Norma relacionada
Practice Relating to Rule 1. The Principle of Distinction between Civilians and Combatants
Rwanda’s Law Repressing the Crime of Genocide, Crimes against Humanity and War Crimes (2003) provides:
Article: 8
A war crime is one of the following acts, committed during armed conflicts against persons or property protected under the Geneva Conventions of 12 August 1949 and their Additional Protocols I and II of 8 June 1977:
9° launching a deliberate attack against the civilian population or against its objects, in the knowledge that such attack will cause loss of life or injury or grave damage to their objects, which would be judged as excessive in relation to the military advantage anticipated;
Article: 9
Shall be punished by one of the following penalties any person having committed one of the war crimes provided for in Article 8 of this law:
1° the death penalty or life imprisonment where he has committed a crime provided for in point 1°, 2°, 3°, 9°, 11° or 16° of Article 8 of this law. 
Rwanda, Law Repressing the Crime of Genocide, Crimes against Humanity and War Crimes, 2003, Articles 8–9.
The Report on the Practice of Rwanda states that attacks against civilians are prohibited according to the practice and the opinio juris of Rwanda and considers that this prohibition is a norm of customary international law binding on all States. 
Report on the Practice of Rwanda, 1997, Chapter 1.4.