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.

At least eight Palestinians who worked for the U.S-backed Gaza Humanitarian Foundation died in an ambush, the GHF said on Thursday, blaming Hamas militants for the killings that rocked the troubled food distribution operation.

The war began when Hamas-led militants killed around 1,200 people, mostly civilians, in the Oct. 7 attack and abducted 251 hostages. More than half the captives have been released in ceasefires or other deals. Israeli forces have rescued eight and recovered the remains of dozens more.