Malim Shah Wali Khan, 53, and his security detail were driving through the volatile southern province of Helmand when militants detonated the bomb, killing him and two of his bodyguards, according to the provincial governor's office.
Four other police officers were injured in the attack. When the blast occurred, Khan and his security team were on their way to a meeting to discuss plans for the ongoing handover of security responsibilities in the province from U.S.-led troops to Afghan forces.
Khan was the Helmand director for the High Peace Council, the group Karzai formed to begin brokering peace talks with the Taliban. So far, Karzai's team has failed to make much progress bringing the militants to the negotiating table.
In a statement, Helmand provincial leaders called Khan's slaying "a big loss for the residents of Helmand" and condemned "this brutal act of insurgents." Helmand is a major stronghold for the Taliban and has been the scene of some of the fiercest fighting between insurgents and international troops.
Karzai’s negotiating team has suffered other major setbacks in recent years. In 2011, his top negotiator, former Afghan President
At the time, several senior Afghan officials blamed