Israel says "there is no famine in Gaza" after the IPC reports more than 500,000 people in the Strip are facing "starvation, destitution and death".

The world's leading authority on food crises says the Gaza Strip’s largest city is gripped by famine, and that it is likely to spread without an immediate ceasefire and an end to restrictions on humanitarian aid.

"An entire population is being pushed into starvation, destitution, and death,” said Belgium's Deputy Prime Minister.

Israel has systematically obstructed food entering Gaza, aid agencies say, as a UN-backed body confirms a famine.

The United Nations human rights office in June accused Israel of "weaponising" food for civilians, calling it a war crime, after documenting hundreds of people killed by the Israeli military as they tried to reach aid distribution sites by run Israel- and U.S.-backed organisation the Gaza Humanitarian Foundation (GHF).

Famine has been determined in Gaza Governorate, where Gaza City is located, according to a warning issued Friday by the IPC.

For now the famine is centred in the governorate of Gaza, one of five in the strip. It is the most densely populated and home to Gaza city. By the end of September, famine is expected to spread south to the governorates of Deir al-Balah and Khan Younis (see maps).

An eyewitness told CBS News that American subcontractors at Gaza Humanitarian Foundation sites shot at Palestinians, a claim GHF denies.