A top leader of the Haqqani militant group was shot dead Sunday night outside a bakery on the outskirts of the Pakistani capital, Islamabad. The Haqqani network is a key force in the insurgency currently battling U.S. forces in Afghanistan. The victim, Nasiruddin Haqqani, was the son of the group’s founder, the brother of its current leader and a top fundraiser for the group. No one has claimed responsibility for his killing.