Media playback is unsupported on your device

Attacks by Afghan allies reveal flaws in recruitment process

25 September 2012 Last updated at 10:21 BST

The deaths of two British soldiers in Afghanistan last weekend brings the number of UK military personnel killed by local Afghan forces to nine this year.

The growing number of coalition troops killed by their Afghan allies is raising questions about the recruitment procedures of Afghan security forces, and the trustworthiness of the tribal leaders who endorse each recruit.

There is mounting concern about the rising number of these so called green-on-blue attacks, and suggestions that too little is being done to deal with them.

Gerry Northam reports