He said the UN “yet again” calls for an immediate humanitarian ceasefire in the six-month long war between Israel and Hamas. Israel is retaliating against Hamas in Gaza over a deadly Oct 7 attack on Israel by the Palestinian fighters.

Israeli prime minister Benjamin Netanyahu said Monday’s airstrike that killed the aid workers was unintended and “tragic.”

“The multiplicity of such events is the inevitable result of the way this war is being conducted,” Dujarric told reporters. “At least 196 humanitarians have been killed since October in the Occupied Palestinian Territory, which is one of the world’s most dangerous and difficult places to work.”

UN Humanitarian and Reconstruction Coordinator for Gaza Sigrid Kaag met with the World Central Kitchen team in Gaza just hours before they were killed and was appalled by the attack, said Dujarric.

The UN has warned of a looming famine in Gaza and complained of obstacles to getting aid in and distributing it.

“We have a deconfliction mechanism,” Dujarric said on Tuesday. “We have noted it was not working properly. We keep delivering aid … on an opportunistic basis, which is no way to run a major aid operation.”

When asked what the UN would say to the Israeli government over the airstrike, he said, “The message is: let humanitarian workers do their job.”