Kenneth Roth, former head of Human Rights Watch, has accused Israel of violating its duty to facilitate humanitarian aid under the Geneva Conventions. He likened Israel's decision to a "resumption of the war-crime starvation strategy" that led to an International Criminal Court warrant.
https://krcgtv.com/news/nation-world/israel-cuts-off-gaza-aid-sparking-international-criticism-and-legal-challenges-hamas-war-united-nations-international-law-united-sates-ramadan-president-donald-trump-benjamin-netanyahu#Prices in Gaza have tripled immediately after Israel's aid cutoff, according to Mahmoud Shalabi, the Medical Aid for Palestinians' deputy director of programs. The United Nations humanitarian chief, Tom Fletcher, criticized the decision as a violation of international humanitarian law, stating that access to deliver vital lifesaving aid must be allowed. Non-governmental groups have asked Israel's Supreme Court for an interim order, claiming the move violates international law and amounts to a war crime. Former Human Rights Watch head Kenneth Roth stated that Israel has an "absolute duty" to facilitate humanitarian aid under the Geneva Conventions, calling the decision a resumption of the "war-crime starvation strategy".
https://apnews.com/article/gaza-israel-hamas-palestinians-aid-explainer-ecc0e70d5ff1120a04bf36626dfd96f4