Cases of foreign troops being attacked by rogue policemen and soldiers, or militants impersonating them, are on the rise as international forces are increasingly partnered with Afghan troops preparing to take the lead in security by the end of 2014.
The shooting was part of a spate of weekend attacks that killed at least nine people, including two other foreign troops. The nationalities of the slain foreign soldiers were not released.
Today's shooting attack by the Afghan soldier took place at a military compound in Helmand province that was occupied by both Afghan and coalition troops, an Afghan military official in the area said.
He said the NATO service member was killed in his quarters and that the shooter got away before the victim's body was discovered.