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. Hamas has yet to respond to the allegations.

The group, which has been harshly criticized by the U.N. and other aid providers, said at least five people had died in an attack on one of its buses.

The open-source intelligence team is investigating allegations by the Gaza Humanitarian Foundation (GHF) that a bus carrying more than two dozen local Palestinian workers was attacked by Hamas. The BBC has reported the story here.