The Israeli Defense Forces issued a new statement in English calling the Israeli military’s strikes that killed seven World Central Kitchen aid workers on Monday a "tragedy."

"It was a terrible chain of errors and it should never have happened," the IDF said. "The IDF takes full responsibility for this regrettable loss of life."

The IDF said earlier that the airstrike came after Israeli forces misidentified a WCK worker in the convoy as a Hamas gunman.

The IDF said WCK correctly coordinated its movements with the IDF prior to the night the workers were killed and that there was a "comprehensive plan" in place for the WCK workers’ movements on Monday.

-ABC News’ Ellie Kaufman

U.S. officials are reviewing Israel's report on the Israel military’s attack on World Central Kitchen aid workers "very carefully" and "will be discussing its conclusions with Israeli officials and with humanitarian organizations in the days to come," Secretary of State Antony Blinken told reporters.

The Israel Defense Forces said its airstrike in Gaza that killed seven WCK aid workers on Monday came after Israeli forces misidentified a WCK worker in the convoy as a Hamas gunman.

Blinken said Israeli Prime Minister Benjamin Netanyahu "indicated" to President Joe Biden in their Thursday call "that Israel would be making further changes to its procedures to make sure that those who are providing assistance to people who so desperately need it in Gaza are protected."

"It's very important that Israel is taking full responsibility for this incident. It's also important that it appears to be taking steps to hold those responsible accountable," Blinken said. "Even more important is making sure that steps are taken going forward to ensure that something like this can never happen again."

Blinken said the U.S. would be "looking to see not just what steps are being taken, but the results that follow" from potential changes to Israeli military operations.

-ABC News’ Chris Boccia

White House national security communications adviser John Kirby warned Friday that if the U.S. doesn’t "start seeing meaningful changes in the way Israel is prosecuting these [military] operations [in Gaza] and allowing for humanitarian assistance [in Gaza], and working toward a hostage deal and cease-fire, then we’re going to have to make changes in our Gaza policy."

In his interview with ABC News' "Good Morning America," Kirby would not say if those changes in Gaza policy would mean conditioning U.S. aid.

But Kirby said President Joe Biden was very clear on his call Thursday with Israeli Prime Minister Benjamin Netanyahu that the U.S. must "see some changes."

"We’ve got to see the humanitarian situation improve in Gaza, or otherwise we will have to try to take a look at our own policy and make decisions, and change the way that we’re supporting Israel," Kirby said.

The U.S. still wants an immediate cease-fire in exchange for the release of the Israeli hostages and for getting more aid into Gaza, Kirby stressed. U.S. officials will be among the negotiators meeting this weekend in Cairo, he said.

Israel Defense Forces released a statement Friday about the deadly airstrike in Gaza that killed seven World Central Kitchen aid workers on April 1.

The IDF said it misidentified a WCK worker in the convoy as a Hamas gunman.

"After the vehicles left the warehouse where the aid had been unloaded, one of the commanders mistakenly assumed that the gunmen were located inside the accompanying vehicles and that these were Hamas terrorists. The forces did not identify the vehicles in question as being associated with WCK," the IDF said in a statement Friday.

"Following a misidentification by the forces, the forces targeted the three WCK vehicles based on the misclassification of the event and misidentification of the vehicles as having Hamas operatives inside them, with the resulting strike leading to the deaths of seven innocent humanitarian aid workers," the statement continued.

The report said there were three strikes on the convoy. It also said WCK workers hit in the first vehicle were hit again while moving to another vehicle in the convoy.

"The investigation's findings indicate that the incident should not have occurred. Those who approved the strike were convinced that they were targeting armed Hamas operatives and not WCK employees," the IDF said. "The strike on the aid vehicles is a grave mistake stemming from a serious failure due to a mistaken identification, errors in decision-making, and an attack contrary to the Standard Operating Procedures."

It said WCK correctly coordinated its movements with the IDF prior to the night the workers were killed and that there was a "comprehensive plan" in place for the WCK movement on April 1.

White House National Security Council spokesman John Kirby told ABC's "Good Morning America" Sunday that any response to Iran's Saturday night attack is up to Israeli forces.

But Kirby stressed that President Joe Biden does not want the situation to escalate or have the U.S. drawn further into any conflict.

When asked by ABC News' Whit Johnson about a response from Israel, Kirby said that it is up to the Israeli government to decide how to respond. He added that "the damage was extremely light," and the defenses in place proved Israel can defend itself.

"I won't speak for the Israelis. It's going to be up to them to decide whether and how they'll respond to this," Kirby said. "They showed last night, an incredible military capability on their own, but certainly in concert with friends."

When pressed about reports that Biden told Israeli Prime Minister Benjamin Netanyahu the U.S. would oppose a counterattack on Iran, Kirby said it was "not an accurate reading" of the president's message. He emphasized that the White House does not "want to see the situation escalate further."

"The president understands the prime minister runs a government for a sovereign state of Israel, and that they'll decide whether and how they're going to respond to what Iran did last night," Kirby said.

Kirby reiterated the White House's message that the president will do "whatever he has to protect our troops and our facilities, our people in the region." He said there is no current threat to U.S. service members and facilities, noting that more U.S. forces moved into the region after Oct. 7 to help defend Israel and shipping channels in the Red Sea.

"We're going to obviously be vigilant to any potential threat to our forces in the region," Kirby said. "But the president has been clear we are not looking for a wider war. We're not looking for a second front or a third front. We're not looking to see escalation and we're certainly not looking for a war with Iran."

Kirby added that good intelligence about the attack helped the U.S. and Israel prepare.

"We've been watching as closely as we could the intelligence picture, we had a pretty good indication of the size and the scale and the scope of what Iran was planning," Kirby said. "That is why, because we had a good sense of what they were going to do and with how much, we were able to really help Israel knock down almost everything that Iran threw at them."