Russian and Ukrainian negotiators will meet in Istanbul on Wednesday evening for their first peace talks in more than seven weeks, with Moscow under pressure from U.S. President Donald Trump to strike a deal or face tough new sanctions.

The warring sides remain far apart after the third round of U.S.-brokered peace negotiations on Wednesday. But there was progress on humanitarian issues.

Negotiators for the warring sides in Istanbul appeared to make little progress on ceasefire terms or a possible summit between their presidents – with their meeting ending after less than an hour.