Three more troops have been killed by so-called friendly members of the Afghan security forces. In response to the incidents, the top U.S. and British commanders are telling very different stories.

One American and two British troops were shot at close range in two separate incidents on Monday, reported the Associate Press. They're the latest "green on blue" attacks as international forces commit to training and working more closely with their Afghan allies. 

But General John Allen says that these tragic incidents are untypical, reported the Telegraph.  

"We should expect that this will occur in counter-insurgency operations, and as we saw it in Iraq and as we've seen it historically in counter-insurgencies, but also in Vietnam. It is a characteristic of this kind of warfare," he said.