More than 15,000 Russian troops along Ukraine border - US envoy

ASPEN, Colorado (REUTERS) - Russia has now amassed around 15,000 troops along the border with Ukraine, the US ambassador to Nato said on Friday, offering a higher figure than one previously cited by the Pentagon.

US Ambassador to NATO Douglas Lute offered the estimate during a security forum in Colorado, saying there were "now up again over about 15,000 Russian troops amassed along the border with Ukraine."