Ukrainian President Volodymyr Zelenskyy is applying more pressure on President Donald Trump to increase the cost of what he sees as Russian obfuscation.

Russian and Ukrainian delegates met in Istanbul on Monday for their second set of direct peace talks, a day after Kyiv launched a shock drone attack on Russia’s nuclear-capable bombers, in an operation that President Volodymyr Zelensky said was a year and a half in the making.

Delegations from the warring sides met for barely an hour and agreed to exchange more prisoners of war - focusing on the youngest and most severely wounded - and return the bodies of 12,000 dead soldiers.