A group of US soldiers arrested for alleged cocaine smuggling cannot be allowed to stand trial in Colombia, Washington's envoy to Bogota has said.
Colombian senators have been calling for the men, who were based in the country, to be extradited from the US.
But US ambassador William Wood said the soldiers are immune from prosecution.
More than 200 Colombian citizens have been extradited to the US to face trial for drug trafficking, under a bilateral deal between the two countries.
Colombian politicians have asked the government to push for the US to hand over the men, arguing that the extradition agreement works both ways.