Israel on Sunday said Rafa Salama, a top commander from the Palestinian Islamist group Hamas, was confirmed killed in a deadly airstrike which the Hamas-run health authorities in Gaza said hit a refugee camp, leaving at least 90 people dead. Hamas meanwhile denied reports that negotiations on a ceasefire and the return of remaining hostages have broken down in the Qatari capital Doha in the wake of the attack. Salama was a key target of Saturday’s strike along with Mohammed Deif, the leader of Hamas’ military wing in Gaza. The pair have been described by Israel as “masterminds of the massacre …