The fighting in Ukraine has been slowing down and this will likely continue in the coming winter months, US intelligence agencies believe.
However, there has been no evidence of fading resistance on the part of Ukrainian forces, US director of intelligence Avril Haines said.
Ms Haines told a defence forum in California that most of the fighting is currently around the Bakhmut and Donetsk region of eastern Ukraine.
She said fighting had slowed down following Russia's withdrawal of troops from the west of the Kherson region last month.
She said both Ukraine and Russian militaries would be looking to prepare for any counter-offensive after the winter.
Ms Haines said US intelligence believes Russian President Vladimir Putin does not have a full picture at this stage of just how challenged his military are.
The institute cited comments by Serhiy Haidai, Ukraine's regional governor in Luhansk, who observed that the weather in the eastern Donbas region was changing as winter conditions set in.
Meanwhile on Saturday, Ukraine President Volodymyr Zelensky described a price cap set by his Western allies on Russian oil exports as "weak" and said it was not "serious" enough to damage the Russian economy.
The move angered the United States and other Western nations with Washington accusing the group of siding with Russia.