"Israel's ground operation will undoubtedly entail a large number of civilian casualties," RIA Novosti quoted the statement as saying.
It is noted that Israel's operation could lead to genocide.
"Both organizations call on the UN and the international community to take a firm stand before it is too late to stop the catastrophe unfolding before our eyes," the text stresses.
Earlier, Israeli Defense Minister Yoav Gallant said that the war that Israel intends to wage against Hamas will be deadly and will change the situation forever.
According to him, the Israeli army will carry out a military operation until the complete destruction of Hamas militants.