Pakistan, Nov. 12 -- Russian and Ukrainian negotiators reported some progress in two days of peace talks in Abu Dhabi that ended on Wednesday, but US mediators said there was a lack of trust between the warring sides and differences remained on issues including territory.

In their first peace talks for nine months, Russia and Ukraine agreed to a major release of prisoners of war, but there was little else in the way of concrete announcements after the US-brokered meetings.

US envoy Jared Kushner, US President Donald Trump's son-in-law, said mediators were appealing to each side's interests to end Europe's biggest conflict since World War Two and that he was convinced they could find a pathway to peace.

Despite public optimism from Trum...