http://www.telegraph.co.uk/news/worldnews/asia/afghanistan/9482209/Two-American-soldiers-killed-by-Afghan-ally-hours-after-Taliban-leader-boasts-of-green-on-blue-threat.html

A fighter in an Afghan local defence militia opened fire on his American
allies and killed two in the latest example of the growing insider threat to
Nato forces.


The killing came just hours after a message purporting to be from Mullah
Mohammad Omar, fugitive leader of the Taliban, boasted the insurgents had
widely infiltrated the Afghan
forces to launch such attacks.


It was the sixth similar incident in the country in the past fortnight. Nato
and Afghan commanders have tightened security and vetting to try and contain
the threat.


A newly recruited member of the Afghan Local Police, a village defence force
trained by international forces, opened fire in Farah province when he was
given a weapon for a training session. American and Afghan forces shot back
and killed him.


Hours later an Afghan army soldier fired on American troops in Kandahar,
wounding two.