An aid worker held captive by the Taliban may have been killed by the US forces trying to save her, according to British Prime Minister David Cameron.  General David Petraeus, commander of the international forces in Afghanistan, has launched a probe into the incident.

Linda Norgrove was captured by members of the Taliban on September 26 near the border with Pakistan, along with three Afghans with whom she was working.  The three Afghans were released, but Norgrove remained held captive.  US forces launched an operation to free her, during which it is possible that a grenade used by US forces killed her.

Her death was initially blamed on her captors, who are said to have attached a "suicide vest" to Norgrove.

Investigators will review footage from the air support provided during the attempted rescue operation, as well as footage captured by video cameras mounted on the helmets of soldiers who participated in the mission.

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