WASHINGTON: Israel has broadly accepted a ceasefire deal with Hamas, a senior US official said Saturday (Sunday in Manila), as the first American airdrops of humanitarian aid were carried out over war-ravaged Gaza.

The framework agreement envisages a six-week cessation of hostilities, which could begin immediately if the Palestinian militant group signs off on the release of the most vulnerable hostages it holds, the official told reporters on a call.

"The Israelis have more or less accepted it," the administration official said. "Right now, the ball is in the camp of Hamas."

The announcement came hours after US military cargo planes began airdropping humanitarian aid into the besieged Gaza Strip.

The United Nations has warned of famine in Gaza, and more than 100 people were left dead earlier this week in a frenzied scramble for food from a truck convoy delivering aid, with Israeli forces opening fire on the crowd.

Saturday's drop, which included 38,000 meals, was conducted "to provide essential relief to civilians affected by the ongoing conflict," the US Central Command said.

A CENTCOM official told Agence France-Presse that the meals were made up of US military rations that did not contain pork, the consumption of which is prohibited by Islam.

Negotiators working around the clock

Negotiators from regional powers have been working around the clock to secure a Gaza truce by the start of the Muslim holy month of Ramadan in about one week.

"It will be a six-week ceasefire in Gaza starting today if Hamas agrees to release the defined category of vulnerable hostages... the sick, the wounded, elderly and women," the administration official said.

Hamas militants took about 250 hostages during their unprecedented cross-border attack on Israel on October 7, 130 of whom remain in Gaza, including 31 whom Israel says are presumed dead. It was unclear how many of the remaining hostages are deemed vulnerable.

The United States hopes any truce would create space for a more enduring peace. A Hamas delegation was expected to fly to Cairo on Saturday for talks on a truce, a source close to the group told AFP.

The administration official said a ceasefire would also allow a "significant surge" in humanitarian aid to Gaza, with airdrops not seen as a replacement for full-scale relief convoys.

"None of these -- maritime corridors, airdrops -- are an alternative to the fundamental need to move assistance through as many land crossings as possible. That's the most efficient way to get aid in at scale," a second US official told reporters.

The UN Security Council issued a statement Saturday voicing "grave concern" over the acute food insecurity in Gaza and urging the unfettered delivery of humanitarian aid "at scale."