KABUL, Sept. 30 (Xinhua) -- A NATO soldier, a NATO civilian contractor and several Afghan soldiers were killed by an Afghan soldier on Saturday in eastern Afghanistan, the latest in growing number of the so-called "green-on-blue" insider attacks in the country, the NATO said Sunday.
"An International Security Assistance Force (ISAF) service member and an ISAF civilian contractor died following a suspected insider attack in eastern Afghanistan yesterday," the NATO-led coalition or ISAF said in a statement.
"It is also known that there were Afghan National Army (ANA) casualties," it said, adding "a joint ANA and ISAF assessment is underway."
The brief statement did not disclose the nationalities of the victims and the exact place of the incident under ISAF policy.
Troops mainly from U.S. have been stationed within the 100,000 strong NATO-led ISAF forces in eastern Afghan provinces.
Four U.S. soldiers were killed when a local policeman opened fire on coalition troops in southern Zabul province earlier this month on Sept. 16.
A total of 51 NATO and U.S. soldiers were killed in about 33 green-on-blue attacks so far this year.
Up to 344 foreign soldiers have been killed in Afghanistan in Taliban-led violence and attacks since the beginning of this year.