Last month America's top general estimated that Russia's military had seen more than 100,000 of its soldiers killed and wounded in Ukraine. Ukraine's armed forces have lost up to 13,000 soldiers so far in the war against Russia, presidential adviser Mykhailo Podolyak has said. His comments are believed to be the first estimate of dead since late August, when the head of the armed forces said nearly 9,000 military personnel had been killed. "We have official figures from the general staff, we have official figures from the top command, and they amount to (between) 10,000 and 12,500 to 13,000 killed," Mr Podolyak told the Kanal 24 channel. "We are open in talking about the number of dead," he added, saying more soldiers had been wounded than had died. Read more:Blitz spirit in Kyiv as heat, light and water supplies are knocked out for daysCaptured documents reveal Moscow's 10-day plan to take over Ukraine and kill its leaders Last month America's top general estimated that Russia's milit