Roadside bombs killed five NATO troops in eastern Afghanistan on Friday, as 100 aid groups warned that violence in the country was spreading to once-stable regions and hindering humanitarian efforts. The soldiers' deaths marked a bloody start to the month in what's already been a deadly year for US and NATO forces in Afghanistan, where a Taliban-led insurgency is raging nearly seven years after their fundamentalist Muslim regime was ousted in a US-led invasion. Four of the NATO soldiers and a civilian died in Kunar province Friday, the alliance said in a statement. The fifth soldier death was in Khost, another eastern province. The alliance did not release the nationalities of the soldiers. However, most of the troops in those areas are American.