A new analysis by the Global Nutrition Cluster, a humanitarian aid partnership led by the United Nations International Children's Emergency Fund, found that 90% of children under the age of 2 in the war-torn Gaza Strip face severe food poverty, meaning they eat two or fewer food groups a day.

The same was true for 95% of pregnant and breastfeeding women in Gaza, according to the report released Monday. And at least 90% of children under 5 are affected by one or more infectious disease, with 70% experiencing diarrhea in the past two weeks, the report said.

In Gaza's southernmost city of Rafah, where most humanitarian aid enters, 5% of children under 2 are acutely malnourished, compared to more than 15% in northern Gaza, which has been isolated by the Israeli military and almost completely cut off from aid for weeks, the report said. Before war broke out last October between Israel and Gaza's militant rulers, Hamas, the acute malnutrition rate across the coastal enclave was less than 1%, according to the report.

The report also found that more than 80% of homes in Gaza lack clean and safe water, with the average household having one liter per person per day.

"The Gaza Strip is poised to witness an explosion in preventable child deaths which would compound the already unbearable level of child deaths in Gaza," Ted Chaiban, deputy executive director for humanitarian action and supply operations at UNICEF, said in a statement. "We've been warning for weeks that the Gaza Strip is on the brink of a nutrition crisis. If the conflict doesn't end now, children’s nutrition will continue to plummet, leading to preventable deaths or health issues which will affect the children of Gaza for the rest of their lives and have potential intergenerational consequences."

-ABC News' Morgan Winsor

Israeli troops have turned Nasser Hospital, the main medical center serving the southern Gaza Strip, into a "military barracks" and are "endangering the lives of patients and medical staff," according to Gaza's Hamas-run Ministry of Health.

The health ministry said Monday that patients and medical staff inside Nasser Hospital are now without electricity, water, food, oxygen and treatment capabilities for difficult cases since Israeli ground troops raided the facility in the southern Gaza city of Khan Younis last week.

The World Health Organization, which warned on Sunday that Nasser Hospital "is not functional anymore," said more than 180 patients and 15 doctors and nurses remain inside the hospital.

The WHO said it has evacuated 14 critical patients from the hospital to receive treatment elsewhere.

The Israel Defense Forces alleges that Hamas, the Palestinian militant group that governs Gaza, has been conducting military operations out of Nasser Hospital and other medical centers in the war-torn enclave -- claims which Hamas denies.

-ABC News' Morgan Winsor

The Israel Defense Forces said its fighter jets hit two Hezbollah weapons storage facilities in Lebanon on Monday.

The IDF said this was in response to the unmanned aerial vehicle launched toward northern Israel earlier in the day, and the Israelis believe it was most likely launched from Lebanon by Hezbollah.

The IDF also said its fighter jets have struck some Hezbollah terrorist infrastructure in Lebanon on Monday.

The Israel Defense Forces said Monday that it has arrested 200 suspects at Nasser Hospital in the city of Khan Younis in the southern Gaza Strip.

Gaza's Hamas-run Ministry of Health said Monday that the IDF arrested medical staff at Nasser Hospital, including the director and the only doctor responsible for caring for patients in the intensive care unit.

Israeli ground forces stormed the hospital last week, looking for members of Hamas who the IDF alleges have been conducting military operations there. Hamas, the Palestinian militant group that governs Gaza, has denied the allegations.

Nasser Hospital is the main medical center serving southern Gaza and was -- until now -- the only fully functioning hospital in the war-torn enclave. The World Health Organization said Sunday that Nasser Hospital "is not functional anymore" after Israeli troops raided the facility.

-ABC News' Jordana Miller, Morgan Winsor and Samy Zayara

Israeli forces, which already entered Gaza’s Nasser Hospital, are also now operating inside the nearby Al-Amal Hospital, the Israel Defense Forces confirmed to ABC News.

"Al-Amal Hospital is currently under multiple attacks, as Israeli forces have directly targeted the third floor of the hospital, resulting in the burning of two rooms," and "the hospital’s water lines were targeted," the Palestine Red Crescent Society said.

Over 8,000 patients were evacuated from the hospital earlier this month, but almost 100 patients still remain inside, the Palestine Red Crescent Society said.