Now we turn to another big story in the world. Starting with an attack in afghanistan. Killing two and injuring nearly a dozen more after a gunfight. It happened just after the mearp defense secretary... See More
Now we turn to another big story in the world. Starting with an attack in afghanistan. Killing two and injuring nearly a dozen more after a gunfight. It happened just after the mearp defense secretary paid a visit to the nation. Martha raddatz has the details. Reporter: The attacks have been unrelenting -- a suicide bomb in kabul this weekend, an attack at a military base on friday. And today, the deadly machine gun assault by an afghan police officer claiming the lives of those two americans. The attack happened just outside this village in wardak province where we once patrolled with u.S. Soldiers. Laptd last year, 35 americans were killed in 46 attacks by afghan es. But today u.S. Forces shot and killed two afghan civilians who drove too close to a u.S. Convoy. A u.S. Major was caught berating one of his soldiers over the -- after the shooting. All of these incidents are taking a toll. It definitely does start to affect the trust of both sides working together. It's a simple as that. Reporter: The violence cast a very big shadow on the first visit of the new secretary of defense chuck hagel, as did the stunning comme from afghan president hamid karzai. Karzai claimed that the u.S. And the taliban were, in effect, working together to destabilize his country, an accusation that outraged many in the u.S. And shows that transitioning out of afghanistan and no easy task. Martha raddatz, abc news, washington.
This transcript has been automatically generated and may not be 100% accurate.