Defense officials confirmed that the IDF is aware of the problem. They said that at one point, the government had even considered making the clans to which the armed men belong responsible for distributing aid to Gaza’s residents, even though some of the clans’ members are involved in terrorism, and some are even affiliated with extremist organizations like the Islamic State.
https://www.haaretz.com/israel-news/2024-11-11/ty-article/.premium/the-idf-is-allowing-gaza-gangs-to-loot-aid-trucks-and-extort-protection-fees-from-drivers/00000193-17fb-d50e-a3db-57ff16af0000
https://archive.md/t28IY
So source: the IDF