Another hospital in the northern Gaza Strip is under siege by Israeli troops, Gaza's Hamas-run Ministry of Health said Tuesday.

Israeli tanks and snipers have surrounded Kamal Adwan Hospital, where more than 7,000 displaced people are sheltering, according to the health ministry. Israeli troops are allegedly firing at "anyone who moves," the health ministry said.

The power was also cut from the hospital, according to the health ministry.

Dozens of wounded people as well as the bodies of at least 108 who have died are currently inside Kamal Adwan Hospital, according to the health ministry.

There was no immediate comment from the Israel Defense Forces.

The IDF alleges that Gaza's militant rulers, Hamas, uses civilian infrastructure, including hospitals, for military activities -- claims which Hamas denies.

Just four hospitals remain operational in northern Gaza, according to the health ministry, as medical services in the besieged enclave struggle to deal with the mounting casualty toll.

-ABC News' Nasser Atta and Morgan Winsor

Dozens of people were killed or wounded in an Israeli airstrike that allegedly targeted a school housing displaced families in the city of Khan Yunis in the southern Gaza Strip on Tuesday morning, according to local medical staff.

A spokesperson for Nasser Hospital in Khan Yunis told ABC News that it had received scores of patients from the scene, including 30 who had died and dozens who were injured.

There was no immediate comment from the Israel Defense Forces.

The strike came on the heels of the IDF's announcement that it would be expanding its offensive on Gaza's militant rulers, Hamas, across the entire strip. The IDF alleges that Hamas uses civilian infrastructure in Gaza, including schools, for military activities -- claims which Hamas denies.

-ABC News' Nasser Atta and Morgan Winsor

The World Health Organization painted a bleak picture of the situation in Gaza on Monday night and called for Israel "to take every possible measure to protect civilians and civilian infrastructure, including hospitals, as per the laws of war."

According to the latest information from the WHO, there are only 18 functioning hospitals in Gaza, with three only providing first aid and the remainder just partial services.

With an increasing number of Palestinians displaced as the war continues, the WHO says, "syndromic surveillance has noted increases in infectious diseases, including acute respiratory infections, scabies, jaundice, diarrhoea, and bloody diarrhoea. Shelters in the south are also reporting cases of acute jaundice syndrome, a worrisome signal of hepatitis." The previously said, "syndromic surveillance systems seek to use existing health data in real-time to provide immediate analysis and feedback to those charged with investigation and follow-up of potential outbreaks."

The WHO warned thousands are likely to be cut off from health care services due to increased ground operations by Israel in southern Gaza. The open hospitals are operating beyond capacity, with the bed occupancy rate at 171% and intensive care units at 221%, the WHO said, based on data from the Hamas-run Ministry of Health.
WHO workers called the situation at the Nasser Medical Complex in Khan Younis "catastrophic, with the building and hospital grounds grossly overcrowded with patients and displaced people seeking shelter."

The WHO said in a statement Monday night it has recorded 203 "attacks on hospitals, ambulances, medical supplies, and the detention of health-care workers attacks on hospitals, ambulances medical supplies" between Oct. 7 and Nov. 28.

"This is unacceptable," the WHO's statement read. "There are means to protect civilians and civilian infrastructure, and they should be instituted."

-ABC News' Jolie Lash and Jade Coburn

Israeli ground forces are now operating "in and around" the key southern Gaza city of Khan Younis, an Israeli military official confirmed to ABC News.

The official said the IDF's "intention" was to "encircle" the city and "eradicate Hamas strongholds within it."

-ABC News' Tom Soufi Burridge

Six Palestinian mothers of premature babies evacuated from the Gaza Strip last month were due to leave the war-torn territory on Monday for Egypt, where their young children remain hospitalized, Palestinian authorities said.

The Palestinian border authority published a list of mothers approved to leave Gaza on Monday via the Egptian-controlled Rafah border crossing and asked them to head there.

Last month, 28 babies born prematurely in Gaza City's besieged Al-Shifa Hospital were transported to Egypt after their incubators shut down amid a collapse of medical services during Israel’s bombardment. Five of the mothers traveled with their children to Egypt, but Egyptian officials said at the time that the status and whereabouts of the other parents were not known.

-ABC News' Ayat Al-Tawy and Morgan Winsor