Hamas leader Ismail Haniyeh was assassinated in Tehran, sparking threats of revenge and escalating fears of a wider Middle East conflict. While widely believed to be an Israeli operation, no official claim was made. Haniyeh's death complicates ceasefire talks in Gaza, with global condemnation and calls for retaliation from Iran and Palestinian factions. His likely successor is Khaled Meshaal, known for his regional influence and charisma.