Taliban Islamist fighters killed six people and wounded 105 others by blowing up a truck bomb at morning rush hour near an Afghan Defence Ministry compound in Kabul on Monday.
The attack, which ended a period of relative calm in the capital, came as U.S. special peace envoy Zalmay Khalilzad held a seventh round of peace talks with the Taliban in Qatar, aimed at bringing the 18-year-old war to an end.
After the blast, five gunmen took up positions in an unfinished building nearby, shooting at rescuers and fighting a battle with security forces for seven hours before themselves being killed.