A bomb attack killed two US soldiers in the volatile southern region of Afghanistan, pushing the death toll of foreign troops in the country to over 50 for the year so far, NATO said on Wednesday.
In a brief statement, NATO's International Security Assistance Force (ISAF) said the two soldiers were killed on Tuesday.
"Two ISAF service members from the United States were killed on Tuesday in an IED strike in southern Afghanistan," it said, referring to an improvised explosive device.
The icasualties.org website puts the toll for 2010 at 51. An ISAF spokesman confirmed that six foreign soldiers have been killed this month.
IEDs are claiming up to 90 per cent of the lives of foreign troops killed as they battle to contain and eradicate insurgents who have been waging war against the Western-backed Afghan authorities for more than eight years.
Around 113,000 international troops in the country will be supplemented by another 40,000 US and NATO forces as the emphasis of the fight shifts to clearing out insurgents and holding territory for development and aid.
Many of the new troops will be deployed to the southern provinces of Helmand and Kandahar, where the Taliban are concentrated, although their footprint has spread rapidly across the country in recent years.
A major offensive is expected in the Marjah region of Helmand, likely to mirror a similar assault last year in the Garmsir region further north which was seen as a success in flushing out insurgents.