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.

The GHF, which began distributing food aid barely two weeks ago from sites in the southern and central Gaza Strip, said the team of about two dozen staff were attacked about 10 p.m. local time while traveling to a distribution center west of Khan Younis.

The Gaza Humanitarian Foundation, which oversees a controversial, Israeli-backed aid- distribution program in the enclave, says at least eight Palestinians died in the attack.