Mughrabi CAIRO (Reuters) -Israeli gunfire and airstrikes killed at least 41 Palestinians across Gaza on Sunday, local health authorities said, five of them near two aid sites operated by the U.S.-backed Gaza Humanitarian Foundation (GHF).

Medical facilities in the Gaza Strip are overwhelmed, staff are exhausted, and resources are virtually nonexistent.

Videos and images verified by NBC News piece together a picture of the deprivation and chaos of Gaza's hospitals.

Palestinian health officials say at least 20 people were killed in Israeli strikes on the Gaza Strip overnight and into Saturday.

Israeli occupation forces shot and killed several Palestinians on Sunday morning across various regions of the Gaza Strip.

U.N. member nations have voted overwhelmingly to demand an immediate ceasefire in Gaza, the release of all hostages held by Hamas, and unrestricted access for the delivery of desperately needed food.

IDF Sgt.-Maj. (res.) Noam Shemesh, 21, a squad commander in the Shimshon Battalion of the Kfir Brigade, was killed in the southern Gaza Strip. Shemesh was from Jerusalem. He was killed by an RPG fired at troops fighting in southern Gaza. The tank fired back and killed three fighters from the cell, as fighter jets killed four.

The Global March to Gaza is a civilian-led initiative to march from Arish, Egypt, to the Rafah border crossing with the Gaza Strip beginning on Sunday. Once in Rafah, the goal was to set up a camp and work to break the Israeli blockade of Gaza, provide humanitarian aid to the strip and protest against Israel's actions in the territory.