The White House said on Thursday that the incident in Gaza City in which dozens of Palestinians were killed as they swarmed a convoy of aid trucks was “tremendously alarming,” as Israel shared drone footage of troops’ attempts to disperse the swelling mob, denying responsibility for the mass deaths amid international criticism of its Gaza offensive.

Hamas has blamed the Israel Defense Forces for a reported 104 deaths in the early morning hours. The military said that fewer than 10 of the casualties were a result of Israeli fire and released new details Thursday night claiming that soldiers had fired warning shots and attempted to ease the crush of people looting a convoy of aid trucks that entered northern Gaza early Thursday morning.

The violence was quickly condemned by Arab countries. US President Joe Biden held talks on the incident with the leaders of Egypt and Qatar, as well as on ways to secure the release of 130 hostages held by Hamas since October 7 and a six-week ceasefire in the war.

Both the White House and State Department expressed horror over what occurred and indicated that they would demand answers from Israel.

“This latest event needs to be thoroughly investigated,” White House spokesperson Olivia Dalton told reporters on Air Force One. “This event underscores the need for… expanded humanitarian aid to make its way into Gaza.”