Related Rule
Practice Relating to Rule 99. Deprivation of Liberty
Nigeria’s Manual on the Laws of War states that “unlawful confinement” of persons protected under the 1949 Geneva Convention IV is a grave breach of the 1949 Geneva Conventions. 
Nigeria, The Laws of War, by Lt. Col. L. Ode PSC, Nigerian Army, Lagos, undated, § 6(c).
Nigeria’s Geneva Conventions Act (1960) punishes any person who “whether in or outside the Federation, … whatever his nationality, commits, or aids, abets or procures any other person to commit any such grave breach of any of the [1949 Geneva] Conventions”. 
Nigeria, Geneva Conventions Act, 1960, Section 3(1).