Six months into the war in Gaza, the killing of a group of aid workers by an Israeli air strike summed up both the dire humanitarian crisis and the lack of a clear way out of a conflict that is leaving Israel increasingly isolated.

The attack on Monday night that killed seven staff of the World Central Kitchen (WCK) aid group, including six foreigners, has angered even some of Israel's closest allies, adding to growing pressure for an end to the fighting.

Israel's military has acknowledged the strike was conducted mistakenly by its forces and apologised for the "unintentional" deaths of the seven, who included citizens of Britain, Australia and Poland, a dual U.S-Canadian citizen and a Palestinian colleague.

But that has done little to ease growing alarm abroad, where public opinion even in traditionally friendly countries like Britain, Germany or Australia has swung against the Israeli campaign in Gaza, launched after the Hamas-led attack on Israel on Oct. 7.

President Joe Biden, who has come under growing pressure from his own supporters to end the fighting, said he was outraged by the convoy attack. On Thursday, following a call with Netanyahu, the White House demanded "concrete and measurable steps to reduce civilian harm" and said future U.S. support would be determined by Israel's actions.