An Israeli soldier’s photo of a Palestinian man from Gaza stripped to his underwear, blindfolded and bound face-down to an iron rod corroborates extensive reporting on Israeli torture of Palestinians in detention and itself may constitute a war crime, rights groups have said.

The image was shared on a now-deleted personal social media account, with the Hebrew-language caption “good morning”. It was brought to wider public attention by a Palestinian writer and activist who goes by Tamer.

Yes, torturing human beings and then bidding the world a good morning with a revealing photograph.

“Both abusive treatment of detainees and the public sharing of humiliating or degrading images of them can constitute war crimes,” said Oneg Ben Dror from the prisoner and detainees department at Physicians for Human Rights Israel (PHRI).