A historian who spent more than a month in Gaza at the turn of the year says he saw “utterly convincing” evidence that Israel supported looters who attacked aid convoys during the conflict.

Jean-Pierre Filiu, a professor of Middle East studies at France’s prestigious Sciences Po university, entered Gaza in December where he was hosted by an international humanitarian organisation in the southern coastal zone of al-Mawasi.

Israel has blocked international media and other independent observers from Gaza but Filiu was able to evade strict Israeli vetting. He eventually left the territory shortly after the second short-lived truce during the war came into effect in January. His eyewitness account, A Historian in Gaza, was published in French in May and in English this month.

In the book, Filiu describes Israeli military attacks on security personnel protecting aid convoys. These permitted looters to seize huge quantities of food and other supplies destined for desperately needy Palestinians, he writes. Famine threatened parts of Gaza at the time, according to international humanitarian agencies.