Israel continued to disregard growing international pressure for an immediate cease-fire in Gaza, ramping up bombardment of the southern part of the Palestinian territory Wednesday.

Besieged Gaza is in desperate need of aid and the United States said it would continue airdrops, despite pleas from Hamas to stop the practice after the group said 18 people had died trying to reach food packages.

A fireball lit up the night sky in the southern city of Rafah Tuesday, the last remaining urban center in Gaza not to have been attacked by Israeli ground forces. About 1.5 million people are crammed in the area, many having fled south toward the border with Egypt.

The sound of explosions was also heard and smoke was seen rising in Gaza City in the north, where Israeli troops have been attacking the city's largest hospital for more than a week.

The Gazan Health Ministry said Wednesday that 76 people had been killed in the last 24 hours, including three killed in Israeli airstrikes in and around Rafah.

The fighting went on unabated two days after the U.N. Security Council passed its first resolution calling for an "immediate cease-fire" and urging the release of the roughly 130 hostages Israel says remain in Gaza, including 34 captives who are presumed dead.

Israeli forces have also surrounded two hospitals in Khan Younis, where the health ministry said 12 people, including some children, were killed in an Israeli strike on a camp for the displaced.

The Palestinian Red Crescent has warned that thousands were trapped in the Nasser hospital in Khan Younis and "their lives are in danger."

'Man-made famine'

Underscoring the desperation of civilians trapped by the fighting, Hamas has asked donor countries to stop their airdrops after 12 people drowned trying to recover parachuted food aid from the sea off Gaza's Mediterranean coast.

Hamas and the Swiss-based Euro-Med Human Rights Monitor also said another six people were killed in stampedes trying to get aid.

"People are dying just to get a can of tuna," Gaza resident Mohamad al-Sabaawi told Agence France-Presse (AFP), holding a can in his hand after a scramble over an aid package.

Hamas has also demanded that Israel allow more aid trucks to enter the territory, which the United Nations has warned is on the brink of a "man-made famine" after nearly six months of fighting.

The war, triggered by the Oct. 7 Hamas's incursion of Israel, has shattered Gaza's infrastructure and aid agencies say all of its 2.4 million people are now in need of humanitarian help.

The U.N. children's fund, UNICEF, said vastly more aid must be rushed into Gaza by road rather than by air or sea to avert an "imminent famine."

UNICEF spokesman James Elder said the necessary help was "a matter of kilometers away" in aid-filled trucks waiting across Gaza's southern border with Egypt.

The U.S. National Security Council said in a statement it would continue trying to get aid by road, but also said it would continue airdrops.

Media footage showed crowds rushing toward aid packages Tuesday being dropped by parachute from planes sent by Jordan, Egypt, the United Arab Emirates (UAE) and Germany.

'Political isolation'

The Oct. 7 incursion resulted in about 1,160 deaths in Israel, according to an AFP tally of Israeli official figures.

Israel's retaliatory war on Gaza, in comparison, has killed at least 32,490 people in Gaza, most of them women and children, according to the Health Ministry.

Israeli troops have shown no sign of a let-up in the fight against Hamas, with the military saying its jets had struck more than 60 targets, including tunnels and buildings "in which armed terrorists were identified."

The U.N. Security Council resolution passed Monday demanded a cease-fire for the remaining two weeks of the Muslim holy month of Ramadan that should lead to a "lasting" truce.

The United States, Israel's top ally, which had blocked previous resolutions, abstained from the vote, prompting Israel to cancel a planned U.S. visit by senior officials.

Hamas leader Ismail Haniyeh said Israel was experiencing "unprecedented political isolation" and losing U.S. "protection" at the Security Council.

Washington has balked at Israeli Prime Minister Benjamin Netanyahu's determination to launch a ground assault on Rafah, and the United States has also expressed increasing concern over the humanitarian toll.

U.S. Defense Secretary Lloyd Austin said before meeting his Israeli counterpart that "the number of civilian casualties is far too high, and the amount of humanitarian aid is far too low" in Gaza.

Talks 'ongoing'

Officials from the two warring sides are in indirect mediated talks in Qatar aimed at agreeing on a cease-fire and the release of hostages.

However, both Hamas and Netanyahu said the talks were failing and blamed each other.

Qatari Foreign Ministry spokesperson Majed al-Ansari said this week the talks were "ongoing."