Eight US troops have been killed in bomb attacks in southern Afghanistan.
The deaths make this month the worst for US troops since the start of the war eight years ago.
A NATO spokesman said several troops were also wounded in 'multiple complex (bomb) attacks' in the south. No other details were immediately available.
Today's deaths come just a day after 11 US troops died in separate helicopter crashes in Afghanistan.
An Afghan civilian was killed and several service members were also wounded in the incidents.
The increase in violence comes at a time when US President Barack Obama is considering whether to send more troops to Afghanistan to fight the Taliban insurgency.
Separately, the NATO force said it has recovered the remains of three civilian crew members and the wreckage of a plane missing since 13 October in the remote Nuristan province.
It said hostile action is not believed to be the cause of the crash.
Efforts to stabilise the country have been further complicated by weeks of political tension over the presidential election.
The election was marred by widespread fraud in favour of incumbent Hamid Karzai, forcing a second round of voting set for 7 November.
Mr Karzai agreed to a run-off under severe international pressure last week after a UN-led fraud investigation annulled a huge chunk of his votes in the original 20 August election.
