Israel, which is besieging the war-devastated Palestinian territory, "is committed to 1,000 more medical evacuations within the next months to the European Union," Hans Kluge said in an interview with AFP.

He said the evacuations would be facilitated by the WHO -- the United Nations' health agency -- and the European countries involved.

On Thursday, UN investigators said Israel was deliberately targeting health facilities in Gaza, and killing and torturing medical personnel there, accusing the country of "crimes against humanity".

Rik Peeperkorn, the WHO representative in the occupied Palestinian territories, said in May that around 10,000 people needed to be evacuated from Gaza for urgent medical care.

The WHO Europe has already facilitated 600 medical evacuations from Gaza to seven European countries since the latest war began there in October 2023.

On Sunday, Doctors Without Borders, the international charity known by its French acronym MSF, called on Israeli forces to immediately stop their attacks on hospitals in northern Gaza after the Health Ministry said Israeli troops had fired on two hospitals over the weekend, AP reported.

Palestinian children sit in the Kamal Adwan Hospital after an Israeli airstrike in Beit Lahia, in the northern Gaza Strip. AFP

Internet connectivity went down in northern Gaza late Saturday, making it difficult to gather information about strikes and complicating rescue efforts.

Israel ordered the entire population of the northern third of Gaza, including Gaza City, to evacuate to the south in the war's opening weeks and reiterated those instructions this month.

Around 400,000 people are believed to have remained.