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.

At least 20 Palestinians were killed in Israeli strikes on the Gaza Strip overnight and into Saturday, according to local health officials. The 20-month war with Hamas has raged on even as Israel has opened a new front with heavy strikes on Iran that sparked retaliatory drone and missile attacks.

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

A humanitarian worker in the territory explains how the situation has devolved in recent weeks—and what she’s doing for her own family.

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.

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.