Centre for Relations and International Affairs of Hawzah Seminar:

Assassination of Gen. Soleimani, a Crime Against Humanity/ Assassination of an Iranian official, attack on Iranian sovereignty

Assassination of Gen. Suleiman and the others is considered as murder. It is not justified by laws of war because there was no war or armed conflict in the time assassination. They have not been tried by any court. So their killing as murder is a serious violation of international human rights law.