U.S. defense chief: Sinwar's death provides opportunity to end 'terrible war' in Gaza; Hezbollah vows escalation

World Health Organization accuses Israel of denying medical specialists entry to Gaza ■ Hamas leader Sinwar killed by IDF soldiers in southern Gaza ■ Gallant: Sinwar's death is clear message to residents of Gaza - surrender and release the hostages ■ Hostages Families Forum calls to seize opportunity to reach deal to release hostages