The charity said it had coordinated its movements with the Israeli military and was traveling in vehicles bearing its logo.
It has now halted its operations in Gaza.
Spanish Prime Minister Pedro Sanchez, who was visiting a Palestinian refugee camp in Jordan on Tuesday, said, “I expect and demand that the Israeli government clarify as soon as possible the circumstances of this brutal attack”.
EU foreign policy chief Josep Borrell, who is also Spanish, said that “despite all the demands for the protection of civilians and humanitarian workers, we see new innocent casualties”.
Warsaw said it sought “urgent clarification” from the Israeli ambassador about the incident, which killed a Polish citizen, and expressed “condolences to the family of our brave volunteer.”
Polish Foreign Minister Radosław Sikorski said the country had also begun its own investigation into the aid worker's death, and Deputy Foreign Minister Andrzej Szena said Israel should compensate the families of the aid workers killed.
“The authorities should think about who should be held criminally responsible for pressing a certain button and how to compensate the families of the victims – even if it is impossible to do so with money,” Sejana told Radio Jet. “
There was also criticism from Beijing, which said it was “shocked” by the attack.
Since Hamas' October 7 attacks started the war, Gaza has been under an almost complete blockade, with the United Nations accusing Israel of blocking the delivery of humanitarian aid.
