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.

Israeli fire killed at least 50 people on Monday, nearly half of them near an aid distribution site run by the U.S.-backed Gaza Humanitarian Foundation, the territory's Health Ministry said, as U.N. officials denounced Israeli-backed aid delivery methods.

The new group backed by Israel and the US for aid distribution in Gaza says Hamas attacked a bus transporting some of its Palestinian workers, killing at least five people.The Gaza Humanitarian Foundation (GHF) said the attack happened on Wednesday night as the bus carrying more than two-dozen workers travelled to a distribution centre in southern Gaza,