How to do regime change
The shooting is the latest in a series of attacks that have racked southern Afghanistan in recent weeks, including the killing of an International Red Cross worker and an ambush on a US military convoy that killed two American servicemen.

There are fears that Taliban remnants are reorganising their forces in an effort to destabilise Mr Karzai's fledgling government. There have been several so-called "night letters" warning Afghans against working with foreigners and threatening those who do with death.

The latest edict by hunted Taliban leader Mullah Mohammed Omar two weeks ago threatened more attacks, declared a jihad against international forces and told Afghans they would be considered enemies if they continued to work with the government. (AP)