The first direct peace talks between Russia and Ukraine in more than three years lasted well under two hours, with no apparent sign of progress so far in narrowing the gap between the sides, and a Ukrainian source called Moscow's demands "non-starters".

The talks have taken place in the warring capitals of Moscow and Kyiv, from Washington and Riyadh, Saudi Arabia, to countries across Europe. Now, all eyes are finally turning to Istanbul to seek an end to Russia's 3-year-old,