The first high-level talks between Russia and Ukraine since the early months of Moscow's 2022 invasion showed they are far from agreement on steps needed for a ceasefire, even though they promised a major swap of prisoners of war.

Some of Russia's demands include the withdrawal of Ukrainian troops from their own territory as a condition for a ceasefire, an unnamed Ukrainian source told Sky News.

ISTANBUL, Turkey -- Russia and Ukraine are due to hold their first direct peace talks in three years Friday, gathering in Istanbul for Turkish-brokered negotiations, but officials and observers expect them to yield little immediate progress on stopping the more than 3-year war.