Related Rule
Sweden
Practice Relating to Rule 6. Civilians’ Loss of Protection from Attack
Section B. Presence of combatants among the civilian population
Sweden’s IHL Manual (1991) states:
The presence of individual combatants, for example among gatherings of people, has sometimes entailed a belligerent considering himself entitled to launch an attack on the gathering, with particularly serious consequences. It is therefore laid down in Article 50 [of the 1977 Additional Protocol I] that the presence of individual combatants within the civilian population may not deprive this population of its civilian character and thus its protection. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.5, pp. 42–43.