Multiple aid workers were killed after a bus was attacked in Gaza on Wednesday night, according to a US-backed humanitarian aid organization which accused Hamas of carrying out the assault.

U.N. member nations have voted overwhelmingly to demand an immediate ceasefire in Gaza, the release of all hostages held by Hamas, and unrestricted access for the delivery of desperately needed food.

Egypt has blocked activists taking part in a planned march to Gaza, halting their attempt to reach the border and challenge Israel’s blockade on humanitarian aid to the Palestinian territory before it could begin.