Israel says it’s acting ‘according to international law’, and accuses Hamas of engineering a humanitarian catastrophe in Gaza.

World Health Organization chief Tedros Adhanom Ghebreyesus spoke following an appeal by more than 100 aid agencies warning of hunger in Gaza while tons of food, clean water and medical supplies sit untouched just outside the territory.

While the international community criticizes the Gaza Humanitarian Foundation, a middle east expert says the U.S.- and Israel-backed organization is taking the power away from Hamas.

LONDON and GAZA -- Hospitals in the Gaza Strip have recorded the deaths of 15 people, including four children, due to famine and malnutrition over the past 24 hours, Gaza's Hamas-run Ministry of Health said Tuesday.

"We're not ignoring the suffering in Gaza — but the blame lies with Hamas, not Israel," said Danon. Israel's ambassador to the UN, Danny Danon, criticized the UN for its hypocrisy regarding Israel, saying,

A new NCRI study found major U.S. and European media outlets echoed Hamas-linked narratives, downplaying terror ties and distorting facts about Gaza aid efforts.

Is there famine in Gaza? The Israeli authority for the strip says no; the Hamas-run health ministry says about 10 people are dying of malnutrition every 24 hours. Warring parties can rarely be taken at their word, and without access for independent journalists, little can be confirmed first hand. Even so, we know more than enough to act.

Israel and Hamas are moving toward a cease-fire agreement following a shift in the balance of power after Israel’s 12-day war with Iran.

Hamas said it had responded on Friday in "a positive spirit" to a U.S.-brokered Gaza ceasefire proposal and was prepared to enter into talks on implementing the deal, which envisages a release of hostages and negotiations on ending the conflict.

ABC News' Tom Soufi Burridge reports on the state of humanitarian aid in Gaza, as well as Israeli military operations targeting Hamas.