White House says Biden is 'frustrated' with Netanyahu but won't confirm if president will call Israeli Prime Minister after deaths of World Central Kitchen aid workers

President Joe Biden is frustrated with Israel after the strike that killed aid workers for the World Central Kitchen but the White House won't say if he'll call Prime Minister Benjamin Netanyahu to express his disappointment. 

When National Security Council spokesman John Kirby was asked about the president's thinking of the attack, he said: 'I think you could sense the frustration in that statement yesterday.'

Biden described himself as 'outraged and heartbroken' in his statement condemning the attack. He also called for an investigation into the incident.

President Joe Biden is frustrated with Israel and its Prime Minister Benjamin Netanyahu after the strike that killed aid workers for the World Central Kitchen; above Biden and Netanyahu in Israel in October

Leaders across the world were outraged when aid workers from World Central Kitchen were killed in an Israeli drone strike

Kirby said the administration would let Israel finish its investigation of the incident and read out its conclusions.

'They have already admitted that they conducted this strike. They have already publicly said that their fault for this strike, and they're working their way through the specific findings and details and I think we need to let them finish that work and speak to it themselves,' he told reporters on Wednesday.

He also pointed out that 'I don't think you can look at what we've been saying, what we've been doing, or even the President's statement last night and say that we've somehow gone easy on Israel in every regard.'

Biden and Netanyahu's relationship has gotten more and more tense as Israel's war against Hamas has continued. The administration is under heavy pressure from home and abroad to ensure the safety of aid workers and get critical supplies to the Palestinian people, many of whom are facing famine.

But, on Tuesday, Biden joined a chorus of world leaders furious over the drone strikes that killed the WCK aid workers in Gaza, including one American.

Biden said Israel 'has not done enough to protect aid workers trying to deliver desperately needed help to civilians' as thousands of Palestinians are caught in the crosshairs of war and left without food, water and other necessary supplies.

The president called for a 'swift' investigation to bring accountability to what he said was not a 'stand alone incident'.

Israel apologized for what it called 'a grave mistake' and said it is investigating the incident.

International outrage ensued after the convoy of aid workers for World Central Kitchen was hit by an Israeli 'triple tap' drone strike on Monday, leaving seven dead. The three cars were marked as humanitarian aid and were struck while moving along a route approved by the Israel Defense Forces (IDF).

President Joe Biden is calling for an investigation and accountability after an Israeli drone strike killed seven aid workers in Gaza on Monday. Dual American-Canadian citizen 33-year-old Jacob Flickinger (right) was among the seven killed in the IDF drone attack

The American killed in the attack was Jacob Flickinger, 33, who was a dual citizen of Canada.

A GoFundMe fundraiser set up to assist Flickinger's partner Sandy and their one-year-old son notes that he was an aid worker in Gaza since early March working with World Central Kitchen and prior to that was on a mission with the organization in Mexico. 

Money raised through the GoFundMe aims to help Flickinger's family 'reestablish themselves after his tragic death.' It claims Flickinger was the 'sole financial provider' and the money will help in setting up a trust for his son, as well as flight and funeral arrangements. 

Also among those killed in the strike were three British armed forces veterans who were serving as security for the aid mission – John Chapman, 57, James (Jim) Henderson, 33, and James Kirby, 47.

Additional relief workers who died in the strike were 25-year-old Palestinian Saifeddin Issam Ayad Abutaha; Australian Lalzawmi (Zomi) Frankcom, 43; Damian Soból, a 35-year-old from Poland.

People carry the body of one of the foreign workers from World Central Kitchen who was killed in the airstrike as the bodies are transported to their families outside of Gaza

American-Canadian Jacob Flickinger, 33, who was one of the seven victims of the strike

British military veterans James Henderson, 33, (center), John Chapman, 57, (left) and James Kirby, 47, (right) were traveling in the World Central Kitchen aid convoy providing meals to Palestinians on Gaza when they were hit and killed by missiles fired by an IDF drone

Polish World Central Kitchen aid worker Damian Sobol, 35, (left) and Australian aid worker Lalzawmi (Zomi) Frankcom, 43 (right) were among those killed in the strike in Gaza

Palestinian Saifeddine Issam Ayad Abutaha, 25, was part of the WCK team that was killed in the strike

World leaders from the countries of the deceased have vented their fury at Israel for the 'outrageous' drone strike on the World Central Kitchen aid convoy.

Britain summoned the Israeli ambassador to London and demanded 'full accountability' over the deaths. The UK government is also considering suspending arms sales to Israel should an investigation reveal wrongdoing, inside sources have reportedly said.

Some progressive lawmakers in the United States have called on Biden to suspend aid to Israel, which appears unlikely. 

The Hamas-run health ministry in Gaza claims 32,000 have been killed in the conflict since the terrorist organization invaded Israel on October 7.

Secretary of State Antony Blinken said the seven victims in the WCK aid convoy 'join a record number of humanitarian workers who have been killed in this particular conflict.'

'We shouldn't have a situation where people who are simply trying to help the fellow human beings are themselves at grave risk,' he said on Tuesday.

'These people are heroes,' Blinken said of the aid workers. 'They run into the fire not away from it. They show the best of what humanity really has to offer when the going gets tough. They have to be protected.' 

At least 196, including 175 members of the UN staff, aid workers have been killed in Gaza, according to United Nations Secretary General Antonio Guterres.

UN Secretary-General Antonio Guterres called the strike 'unconscionable' but 'an inevitable result of the way the war is being conducted'.

'It demonstrates yet again the urgent need for an immediate humanitarian ceasefire.'