Israel-Gaza live updates: 3 premature babies die at Al-Shifa Hospital, doctor says

Dr. Tom Potokar, the International Committee of the Red Cross' chief surgeon who is currently working in the European Gaza Hospital, detailed the challenges they are facing in a phone interview with ABC News Live on Friday.

Potokar, who specializes in burn treatments, said they have seen "many, many" burn cases, adding that the number of burn patients is "relentless" and "not slowing down at all." The patients with burn injuries have been all ages, with the youngest they've seen just 4 months old, he said.

"A lot of them have burns involving the face as well, and the limbs," Potokar said. "These could be quite deep burns, as I say, so will lead to significant scarring potentially in the future if they actually survive."

Potokar, who has been a war surgeon in Gaza before, said the damage is "far, far" worse and in a "completely different stratosphere from how I've ever come across it before."

He said the way they are treating burns is "not ideal" under the current circumstances due to limited medical supplies.

"The way we're treating burns is really stepping back 40, 50 years," he said.

-ABC News' Josh Ascher, Kelly Johnstone, Casey McShea and Michelle Stoddart

The Israel Defense Forces denied carrying out a strike that hit an outpatient clinic at Gaza's Al-Shifa hospital Friday morning, stating it was a "misfired projectile launched by terrorist organizations inside the Gaza Strip."

There were two incidents at the hospital Friday morning, according to videos verified by ABC News. In one incident, a shell hit the refugee encampment outside of the hospital entrance. In the second incident, a strike hit the outpatient clinic where people were sheltering.

The Hamas-run Gaza Health Ministry blamed the Israeli military for the strike that hit the outpatient clinic.

As the humanitarian crisis in Gaza continues to worsen by the day, Jens Laerke, spokesperson for the United Nations humanitarian office, said, "If there is a hell on earth today, its name is northern Gaza."

"People who remain there, the corners of their existence are death, deprivation, despair, displacement, and literally, darkness," Laerke said. "The entire Gaza Strip has been plunged into darkness. … What do you tell your children in such a situation? It's almost unimaginable."

People are fleeing Gaza's Al-Shifa hospital, sources confirmed to ABC News, in the wake of a strike on the exterior area of the hospital's outpatient clinic. One surgeon told ABC News "everyone" has fled, calling it a "nightmare."

The hospital has been treating thousands of wounded people and housing as many as 80,000 displaced residents, according to The Associated Press.

The hospital's head of plastic surgery, Dr. Ahmed Mokhallalati, told ABC News he is among the roughly 15% to 20% of staff members still there on Friday.

Although many patients have evacuated, he said, "There is no hospital in Gaza that can accommodate this number of ICU patients -- around 100 ICU patients."

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ABC News Live: Explosions near a hospital in Gaza

This comes as the Palestinian Islamic Jihad releases new images that appear to show two hostages alive in Gaza.

The Palestinian Red Crescent said occupation snipers fired on Gaza's Al-Quds Hospital, killing at least one and injuring at least 28.

Israel Defense Forces spokesman Richard Hecht said, "The IDF does not shoot at hospitals. If there are Hamas terrorists in the hospitals, the IDF will do what it needs to, but we are aware of the sensitivity. We tell Hamas to move the sick southward."

"Slowly we are closing in on them and taking every precaution not to harm the innocent," he said.