Related Rule
Practice Relating to Rule 99. Deprivation of Liberty
Section A. General
Burundi’s Regulations on International Humanitarian Law (2007) lists “unlawful detention” as a “grave breach” of IHL. 
Burundi, Règlement n° 98 sur le droit international humanitaire, Ministère de la Défense Nationale et des Anciens Combattants, Projet “Moralisation” (BDI/B-05), August 2007, Part I bis, p. 115; see also Part I bis, pp. 27 and 46.
Burundi’s Law on Genocide, Crimes against Humanity and War Crimes (2003) states:
[The following are] considered as war crimes:
A. Grave breaches of the Geneva Conventions of 8 August 1949, namely, any of the following acts aimed at persons or objects protected by the provisions of the Geneva Conventions:
g) … unlawful confinement. 
Burundi, Law on Genocide, Crimes against Humanity and War Crimes, 2003, Article 4(A)(g); see also Article 3(e) (crimes against humanity).
Burundi’s Penal Code (2009) states:
“War crimes” means crimes which are committed as part of a plan or policy or as part of a large-scale commission of such crimes, in particular:
1. Any of the following grave breaches of the 1949 Geneva Conventions … :
7°. … [U]nlawful confinement. 
Burundi, Penal Code, 2009, Article 198(1)(7°).