Furious Biden tells Netanyahu the strike that killed aid workers and the humanitarian situation are 'unacceptable' and threatens US could change stance on Gaza if he doesn't protect civilians

President Joe Biden warned Benjamin Netanyahu on Thursday that America's policy in regard to the Israeli-Hamas war will be determined by the steps the prime minister takes to address 'civilian harm, humanitarian suffering, and the safety of aid workers.'

Biden's tough talk came as the two men spoke for about an hour on Thursday amid world-wide outrage after an Israeli drone strike killed seven aid workers in Gaza – including one dual American-Canadian citizen.

'President Biden emphasized that the strikes on humanitarian workers and the overall humanitarian situation are unacceptable,' the White House said in a readout of the call.

'He made clear the need for Israel to announce and implement a series of specific, concrete, and measurable steps to address civilian harm, humanitarian suffering, and the safety of aid workers. He made clear that U.S. policy with respect to Gaza will be determined by our assessment of Israel’s immediate action on these steps.'

Biden has been under pressure at home and abroad to do more to ensure civilian safety in Gaza. 

Biden was said to be 'p***ed' at the prime minister and progressive lawmakers are pushing the president to cut aid to Israel. 

Israel is investigating the drone strike that killed the World Central Kitchen workers, who were delivering food to starving Palestinians in the Gaza strip.

The latest tete-a-tete between the two leaders comes as relations between Washington and Tel Aviv are detriorating over American fury not enough is being done to help the civilian population and Palestinian refugees. 

Biden and Netanyahu last spoke on March 18th but this was their first conversation since the strike.

Meanwhile, elebrity chef Jose Andres told Reuters in an emotional interview on Wednesday that his aid workers were tageted "systematically, car by car."

He said his charity had clear communication with the Israeli military, which he said knew his aid workers' movements.

"This was not just a bad luck situation where ‘oops’ we dropped the bomb in the wrong place," Andres said.

'This was over a 1.5, 1.8 kilometers, with a very defined humanitarian convoy that had signs in the top, in the roof, a very colorful logo that we are obviously very proud of,' he said. 'It's 'very clear who we are and what we do.' 

Jacob Flickinger, 33, was a dual citizen of America and Canada who was killed in the strike. He was a veteran of the Canadian Armed Forces who served in Afghanistan.

Flickinger's father wrote in a Facebook message paying tribute to his son: 'My son, Jacob, was killed Monday delivering food aid to starving families in Gaza. He died doing what he loved and serving others through his work with the World Central Kitchen.'

A GoFundMe was set up to help Flickinger's partner Sandy, whom he shared a one-year-old son with, pay for any flights and funeral costs, as well as take off some of the burden considering Flickinger was the sole earner.

Biden described himself as 'outraged and heartbroken' in his statement condemning the attack.  

He 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.

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).

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.