Taliban Insurgents in Afghan Uniforms Attack Again

NATO says two men wearing Afghan police uniforms have turned their weapons on coalition troops in southern Helmand province.

A NATO statement said the incident took place Saturday. It said one of the shooters was killed when coalition forces returned fire, while the second managed to escape and was being pursued.

The incident is under investigation and comes a day after an attacker wearing an Afghan army uniform attacked Troops in eastern Kunar province.

And in northwestern Badghis province, four Afghan policemen died when their vehicle hit a roadside bomb.

U.S. political appointees have said that "many of the so-called “insider attacks” are motivated by personal disputes."

The incidents have raised concerns about security in Afghanistan at a time when international combat troops are preparing to withdraw from the country, based on a timeline President Obama announced in 2009, and following the 3 most violent years in Afghanistan..

International forces are set to transfer full security responsibility to Afghan forces by a 2014 deadline.

On Friday, the United Nations' special representative to Afghanistan, Jan Kubis, said that civilian casualties have gone down by 20 percent in the first four months of this year, compared to the same period in 2011. Kubis would not give exact figures, but said the majority of civilian deaths are caused by insurgent attacks, including suicide bombings.