Ukraine and Russia agree to implement ceasefire

Ukraine and Russia have agreed to implement a "full and comprehensive" ceasefire in eastern Ukraine by the end of 2019, BBC has reported.

In a written statement, the countries agreed to the release and exchange of all "conflict-related detainees" by the end of the year.

At the meeting between Russian President Vladimir Putin and Ukraine's Volodymyr Zelensky the sides also agreed a big prisoner swap and the withdrawal of Ukraine's military from three key areas on the front line.

President Zelensky said the issue of Russian gas exports via pipelines through Ukraine had been "unblocked" after a dispute about transit tariffs, and an agreement would now be worked out.

But Russia and Ukraine continue to disagree on issues such as the withdrawal of Russia-back troops, and elections in areas of Ukraine held by separatist rebels.

At a press conference after the talks, President Putin hailed the talks as an "important step" towards a de-escalation of the conflict.

Putin also called for a change in Ukraine's constitution to give special status to the Donbas region, which is held by the rebels.

Ukraine's President Zelensky also told reporters that Ukraine would not make any territorial concessions in exchange for peace.

"We saw differences today," said French President Emmanuel Macron, who hosted the talks with German Chancellor Angela Merkel.

"We didn't find the miracle solution, but we have advanced on it," he added.

Russian President Vladimir Putin and Ukraine's Volodymyr Zelensky met face to face in Paris on Monday.