King Abdullah II of Jordan says his country dropped aid by parachute into northern Gaza at midnight.

"Our fearless air force personnel air-dropped at midnight urgent medical aid to the Jordanian field hospital in Gaza," read a post on X (formerly Twitter). "This is our duty to aid our brothers and sisters injured in the war on Gaza. We will always be there for our Palestinian brethren."

The king posted two photos of a crate with the flag of Jordan on it being loaded onto an airplane.

The Israel Defense Forces said Sunday it had "reached the seashore in the southern part of the city of Gaza and encircled the city of Gaza," calling the encirclement a "significant step" in the fight against Hamas.

"We will continue to attack strongly and continue to intensify our ground operation in the northern Gaza Strip and Greater Gaza City," the IDF said.

The IDF is still urging residents in northern Gaza to move south.

"We are intensifying our attack and this is already happening tonight significantly," the IDF warned.

Israeli Prime Minister Benjamin Netanyahu said Sunday at the Ramon Air Force Base in Israel that "there will be no cease-fire without the return of the hostages."

Israeli officials say 241 people have been taken hostage.

Secretary of State Antony Blinken traveled to Iraq to meet with Iraqi Prime Minister Mohammed Shia al-Sudani on Sunday following the secretary's visits to Israel, Jordan and the West Bank.

Blinken told reporters that his meeting with the Iraqi prime minister was productive and said he emphasized the need to prevent spillover from the conflict in Gaza.

"I made very clear that the attacks, the threats coming from militia that are aligned with Iran are totally unacceptable," Blinken said. "We're not looking for conflict with Iran. We've made that very clear. But we'll do what's necessary to protect our personnel."

"We're working very hard to make sure that the conflict in Gaza does not escalate, does not spread to other places, whether it's here, whether it's elsewhere in the region," he said.

Blinken was asked about Arab leaders' instance that nothing short of a total cease-fire would be acceptable.

"I think everyone would welcome humanitarian pauses -- there's no doubt about that," Blinken responded.

He said pauses "advance things that we're all trying to accomplish," including getting more humanitarian aid into Gaza, getting people out of Gaza and getting hostages home.

On his meeting with Palestinian Authority President Mahmoud Abbas, Blinken said the PA was "playing a very important role right now in the West Bank in trying to keep stability there."

-ABC News' Shannon Crawford

Secretary of State Antony Blinken, who is en route to Israel and Jordan, said this trip he's focused on de-escalation and the plight of the Palestinians.

"We will be talking about concrete steps that can and should be taken to minimize harm to men, women and children in Gaza," Blinken said.

"When I see a Palestinian child, a boy or a girl, pulled from the rubble of a collapsed building -- that hits me in the gut as much as seeing a child in Israel or anywhere else. So this is something we have an obligation to respond to, and we will," he said.

The secretary identified three key goals for his trip.

"First, to talk to the Israeli government about the ongoing campaign against the Hamas terrorist organization," Blinken said. "Israel has not only the right but the obligation to defend itself, and also to take steps to try to make sure that this never happens again. … We've also said very clearly and repeatedly that how Israel does this matters. We will focus as well on steps that need to be taken to protect civilians who are in a crossfire of the Hamas’ making, and we want to look at concrete steps that can be taken to better protect them."

Blinken said his second objective is getting humanitarian aid into Gaza and getting people who want to leave out of Gaza.

Blinken said his third goal is to try to set the groundwork for a resolution to the conflict.

The secretary added that the administration is still "intensely focused" on the hostages in Gaza and "taking every possible step that we can in concert with others to secure their release."

-ABC News' Shannon Crawford