Another American soldier has been killed in southern Afghanistan, a NATO statement announces.
NATO's International Security Assistance Force (ISAF) said on Saturday that the attack occurred on Friday.
At least 327 US troops have been killed in the war-torn country since the beginning of this year.
Despite the casualties, commander of US and NATO forces in Afghanistan General David Petraeus said on Tuesday that more troops will be deployed in Afghanistan.
A new poll, released by Associated Press-GfK, indicates that a majority of Americans see no end in sight to the war and nearly six out of 10 oppose the nine-year-old conflict.
The issue will be a major political hot potato in the US November mid-term elections, in which voters will be choosing one third of the Senate and the full House of Representatives.
Pundits say US President Barack Obama and the Democratic Party face an uphill battle, but Obama has expressed confidence that his party will retain control of both houses of Congress in the elections.