http://www.bbc.co.uk/news/world-middle-east-14118884
The Taliban are still striking at will after ten years of war. Wonder how long before Mr Karzai himself gets taken out. You have to wonder how peace will come to Afghanistan when NATO and US forces are deciding to pull out yet violence is continuing unabated.
The half-brother of Afghan President Hamid Karzai has been assassinated in Kandahar, officials say.
Ahmad Wali Karzai, a leading power broker in the country's south, was shot dead at his home in a blow to Nato's battle against the Taliban in the area.
He was shot twice by his long-time head of security Sardar Mohammed, who was himself killed almost immediately.
The Taliban said they carried out the attack, calling it one of their top achievements in 10 years of war.
Sardar Mohammed's motives remain unclear, but the killing will raise questions about securing Afghanistan's top officials.
Previous assassination attempts
Ahmad Wali Karzai's killing is the latest and most high-profile in a series of assassinations of senior politicians and security commanders across the country.
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It is hard to overstate how important he was in the south of Afghanistan and in Nato's efforts to combat the Taliban in their stronghold there, adds our correspondent.
The Commander of the International Security Assistance Force, US General David Petraeus, condemned the assassination, and said ISAF would work with the Afghan government to bring anyone involved to justice.
"President Karzai is working to create a stronger, more secure Afghanistan, and for such a tragic event to happen to someone within his own family is unfathomable," said Gen Pertraeus.
Ahmad Wali Karzai had survived attempts on his life before, most recently in a rocket and machine gun attack in 2009 as his convoy was travelling towards Kabul.
The previous year, he was chairing a meeting in a government building when a bomb-filled fuel tanker exploded close by.
Although Mr Karzai escaped unhurt, six people were killed and 40 wounded in the blast.
He and other officials blamed Taliban militants for the bombing.
In 2003, Mr Karzai's house in Kandahar city was hit by an explosion which he said was caused accidentally when some weapons were being moved.
The Taliban are still striking at will after ten years of war. Wonder how long before Mr Karzai himself gets taken out. You have to wonder how peace will come to Afghanistan when NATO and US forces are deciding to pull out yet violence is continuing unabated.