Four aid workers, among them a British woman, have been freed by coalition forces in Afghanistan after being held hostage for 11 days. Helen Johnston and her colleagues, who work for a Swiss charity, were seized at gunpoint while visiting relief projects in a mountainous region of eastern Afghanistan.

Lieutenant Colonel Jimmie Cummings, from the International Security Assistance Force, Isaf, told the programme that the rescue team was inserted by helicopter during the hours of darkness, and freed the four people, who are said to be well, from their captivity in a cave complex.

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