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 fighters attacked southern Israel on Oct. 7, 2023, killing some 1,200 people, mostly civilians, and taking 251 hostage. They are still holding 53 captives, less than half of them believed to be alive, after most of the rest were released in ceasefire agreements or other deals.