Tens of thousands gathered in Beirut to mourn the group’s former leader, as its new chief vowed to keep fighting Israel.

Tens of thousands gathered in Beirut on Sunday to attend the funeral of Hezbollah leader Hassan Nasrallah and his cousin and top aide, Hashem Safieddine, nearly five months after their assassination.

Hundreds of thousands of people packed into a stadium in Beirut and the streets outside Sunday for the funeral of Hezbollah's ...