"The loss of any of our coalition partners affects us deeply," Gen. Karimi said. "Our ongoing, partnered investigation will seek to determine how this event could have occurred, and we will prosecute those responsible."
Rogue Afghan soldier kills 3 British troops →
"But by no means (do) we have a policy of offensive operations," he said. "Our strategy is defensive."
Afghan, NATO troops ramp up fight against Haqqani →