World Health Organization officials visited the hospital in Gaza on Saturday.
Thousands of people have died and thousands more have been injured since the militant group Hamas launched an unprecedented surprise attack on Israel on Oct. 7 and Israel retaliated with a bombing campaign and total siege of the neighboring Gaza Strip, leaving the region on the verge of all-out war.
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The latest outbreak of war between Israel and Hamas, the Palestinian militant group that governs the Gaza Strip, has passed the four-month mark.
In the Gaza Strip, at least 30,228 people have been killed and 71,377 others have been wounded by Israeli forces since Oct. 7, according to Gaza's Hamas-controlled Ministry of Health.
In Israel, at least 1,200 people have been killed and 6,900 others have been injured by Hamas and other Palestinian militants since Oct. 7, according to the Israel Defense Forces.
There has also been a surge in violence in the Israeli-occupied West Bank. Israeli forces have killed at least 395 people in the territory since Oct. 7, according to the Palestinian Ministry of Health.
The ongoing war began after Hamas-led militants launched an unprecedented incursion into southern Israel from neighboring Gaza via land, sea and air. Scores of people were killed while more than 200 others were taken hostage, according to Israeli authorities. The Israeli military subsequently launched retaliatory airstrikes followed by a ground invasion of Gaza, a 140-square-mile territory where more than 2 million Palestinians have lived under a blockade imposed by Israel and supported by Egypt since Hamas came to power in 2007. Gaza, unlike Israel, has no air raid sirens or bomb shelters.
The Israel Defense Forces said it's still operating at Gaza's Al-Shifa Hospital, searching the hospital floor-by-floor as doctors and patients remain sheltered inside.
The IDF said during its searches at the hospital forces have found Hamas intelligence material, weapons and information about the hostages.
National Security Council spokesperson John Kirby reiterated that the U.S. is "still convinced of the soundness" of its intelligence that Hamas is using Gaza's Al-Shifa Hospital as a command center.
"We have our own intelligence that convinces us that Hamas was using Al-Shifa as a command-and-control node, and most likely as well as a storage facility," Kirby said. "And they were sheltering themselves in a hospital, using the hospital as a shield against military action and placing the patients and medical staff at a greater risk. We are still convinced of the soundness of that intelligence."
-ABC News' Molly Nagle
Seventy percent of the population in southern Gaza had no access to clean water as of Wednesday, Philippe Lazzarini, commissioner-general of the United Nations Relief and Works Agency for Palestine Refugees in the Near East, told Al Jazeera.
He said raw sewage is "starting to flow in the streets," and if fuel isn't brought into Gaza soon, he warned, "We run the risk to have to suspend the entire humanitarian operation."
Dr. Sara Al Saqqa, a surgeon at Gaza's Al-Shifa Hospital, fled the hospital complex several days ago "because everything was pretty horrific and terrifying," she told ABC News.
She said most of her colleagues and patients evacuated the hospital, where Israeli troops are carrying out a dayslong raid, but she said nearly 100 doctors remain there, along with more than 700 patients and thousands of people seeking refuge.
"The situation now is a disaster at Al-Shifa," she said. "Israeli occupational forces have invaded Shifa Hospital with their tanks and destroyed most of the medical equipment there. … They shot a lot of people and they arrested more."
The Israeli army alleges that Hamas has placed its command centers under Al-Shifa and other hospitals in Gaza and is deliberately sheltering behind Palestinian civilians -- claims that the militant group denies.
National Security Council spokesperson John Kirby said the U.S. has intelligence that Hamas has used Gaza's hospitals, including Al-Shifa, to support its military operations and hold hostages.
The IDF's operations at the hospital are ongoing Thursday.
The Israelis said that they found explosives inside the medical complex, but Al Saqqa said the Israelis "didn't find the things that they are looking for because there is no military activity inside the hospital. And this is something that's obvious to all of us, the ones working there for several years."
