Insider attack kills 3 US troops in Afghanistan

A man in an Afghan army uniform turned his weapon on the American troops working with him in the country's east on Saturday, killing three of them, while an attacker with a grenade killed an Italian soldier in the west, officials said.

The shooting in Paktika province was the latest in a string of so-called "insider attacks" in which Afghan forces open fire on their own comrades or international troops. The incidents threaten to shake the confidence and trust of the two sides as the 2014 withdrawal of most of the international forces approaches. (AP)