Ukraine and Russia have commenced a second round of peace talks in Istanbul, with low expectations following a previous round that resulted in a significant prisoner exchange but little progress on ending the invasion. Ukraine's President Zelenskyy has outlined three priorities: a ceasefire, another prisoner exchange, and the return of deported Ukrainian children. The Kremlin has not disclosed its priorities, focusing instead on 'root causes' of the conflict. Both sides are expected to submit peace memorandums. US President Trump has expressed frustration with Russia's actions and called for stronger sanctions if talks fail.