The U.N. chief has said that the United Nations has offered to monitor any cease-fire in Gaza and demanded an end to the worst death and destruction he has seen in his more than seven-year tenure.

Secretary-General António Guterres said in an interview with The Associated Press that it's "unrealistic" to think the U.N. could play a role in Gaza's future, either by administering the territory or providing a peacekeeping force, because Israel is unlikely to accept a U.N. role.