The humanitarian crisis in Gaza is escalating, with health officials warning that 15 people, including four children, have died due to malnutrition in just the last 24 hours. NBC News’ Matt Bradley reports as international pressure mounts on Israel to allow more aid into the region.

Fifteen deaths have been reported over the past day, the Hamas-run ministry says, as the UN warns of "soaring" malnutrition.

The U.N. human rights office says more than 1,000 Palestinians have been killed since May while trying to get food in the Gaza Strip.

The aid agency says its buildings in the central part of the territory were attacked after the military targeted Deir al-Balah, which had largely been spared.