One of Hamas's highest-ranking figures is reported dead after Israel said it struck him in an air attack, marking what would be the most senior killing of a Hamas official since the October US-backed ceasefire deal intended to stop the war in Gaza. In Gaza City, witnesses said mosques had announced the death of Izz al-Din al-Haddad. If confirmed, he would be the most senior Hamas official killed by Israel since the ceasefire agreement reached in October with US backing, which was supposed to bring the fighting in Gaza to a…