Three US service members died when their vehicle hit a roadside bomb in southern Afghanistan, a Nato spokesman said today.
Col Wayne Shanks, a spokesman for Nato and US forces, said the deaths occurred yesterday. He did not release any other details.
The bombing came amid a wave of attacks by Afghan insurgents against US and Nato forces in recent days, and increased the number of deaths among American troops in Afghanistan this month to 22.
Violence has risen across Afghanistan in the last three years as the resurgent Taliban has regained control of large swaths of countryside. August was the deadliest for US forces since the war with the Taliban began in 2001.
Fighting has been particularly harsh this summer in the south, where thousands of US troops have deployed to bolster the Canadian and British-led operations in the Taliban heartland.