The warning focused on the north comes as the Biden administration has set a mid-November deadline for Israel to deliver more humanitarian supplies to the enclave or face a cutoff of weapons aid.

Several United Nations agencies are again sounding the alarm on the rapid deterioration of humanitarian conditions in much of Gaza and the civilian toll of more than a year of Israeli military operations.

The U.N. Human Rights Office said on Friday nearly 70% of the fatalities it has verified in the Gaza war were women and children, and condemned what it called a systematic violation of the fundamental principles of international humanitarian law.

The UN's Human Rights Office has condemned the high number of civilians killed in the war in Gaza, saying its analysis shows close to 70% of verified victims over a six-month period were women and children.