Norma relacionada
Practice Relating to Rule 6. Civilians’ Loss of Protection from Attack
Section A. Direct participation in hostilities
Nigeria’s Operational Code of Conduct (1967) states: “Youths and school children must not be attacked unless they are engaged in open hostilities against Federal Government Forces.” It further states: “male civilians who are hostile to the Federal Forces are to be dealt with firmly but fairly”. 
Nigeria, Operational Code of Conduct for Nigerian Armed Forces, Federal Military Government of Nigeria, July 1967, § 4(b) and (j).
According to Nigeria’s Manual on the Laws of War, “participation in hostilities by civilians” is an example of a war crime. 
Nigeria, The Laws of War, by Lt. Col. L. Ode PSC, Nigerian Army, Lagos, undated, § 6.
The Report on the Practice of Nigeria states that it is the opinio juris of Nigeria that the rule that civilians are deprived of protection when they engage in hostilities against federal forces is part of customary international law. 
Report on the Practice of Nigeria, 1997, Chapter 1.2.