Hamas political leader Haniyeh assassinated in Iran, plunging Middle East conflict into dangerous new phase CNNHamas political leader Ismail Haniyeh killed in Iran CNNU.S. concerned Hamas leader’s assassination could derail Gaza hostage-ceasefire talks AxiosLive Updates: Killing of Top Hamas Leader in Iran Raises Risk of Wider War The New York TimesWhat to know about Ismail Haniyeh, assassinated leader of Hamas’ political bureau ABC News