World Central Kitchen (WCK), which is owned by Spanish celebrity chef Jose Andres and one of the largest provider of Gaza humanitarian aid, said its aid efforts would be suspended, BBC News reports. "We will be making decisions about the future of our work soon," the charity said in a statement.
Three of the deceased were UK nationals, one Polish, one Australian, one dual US-Canadian citizen and one Palestinian.
The IDF has vowed to investigate the incident and Israeli Prime Minister Benjamin Netanyahu took responsibility for it.
"Unfortunately, in the last 24 hours there was a tragic case of our forces unintentionally hitting innocent people in the Gaza Strip," he said. "It happens in war, we check it to the end, we are in contact with the governments, and we will do everything so that this thing does not happen again."
Israeli President Isaac Herzog also reportedly apologized for the deaths.
From the US, White House spokesman John Kirby said he was "outraged" by the strike while Press Secretary Karine Jean-Pierre told reporters Joe Biden was "heartbroken."
UK Prime Minster Rishi Sunak spoke to Netanyahu on Tuesday and said the war in Gaza has become "increasingly intolerable" and he "demanded a thorough and transparent independent investigation" into the killing of the aid workers.
Australian Prime Minister Anthony Albanese stated "Someone going about providing aid and humanitarian assistance should [never] lose their life."