On June 11, 1903, the Serbian King and Queen were assassinated. On June 11, 1903, the Serbian King Alexander and Queen Mahin were killed in Belgrade's palace. The assassination was part of the revolutionary plan of the Serbian military and government officials organized by the Serbian King and Queen Alexander. On June 11, 1903, the Serbian King Alexander and Queen Mahin were killed in Belgrade's palace. Although because the assassination plan was strictly secret, many details were unknown, but people believe that the King Alexander wanted the General's College to be expelled from Belgrade, so that the military declared the army angry. Therefore, after he declared the constitution ceased to be effective, the majority of observers believed that the Serbian government would continue to commit assassination. While the massacre began by the Olympic