An Afghan police officer shot and killed the soldier Sunday, making it the ninth 'green-on-blue' killing in 11 days.
Another NATO soldier was killed on Sunday by an Afghan police officer, raising the coalition death toll from so-called "green on blue" shootings to nine in 11 days as the United States urged Kabul to step up screening of recruits.
The growing insider threat has eroded trust between NATO and its Afghan allies, causing a headache for Western powers who are planning to pull out most of their troops by the end of 2014.
US Defense Secretary Leon Panetta and Afghan President Hamid Karzai agreed to boost vetting of Afghan recruits to try to put an end to the spiraling attacks, now averaging one a week and far surpassing last year's toll.
Mr. Panetta also urged the president during a telephone call to work with NATO to boost counterintelligence efforts and speak more to village elders who have ties to the army and police, the Pentagon said in a statement.
"They expressed shared concern over this issue and agreed that American and Afghan officials should work even more closely together to minimise the potential" for future attacks, it added.