Ukrainian President Volodymyr Zelensky has called on world leaders to respond after a video emerged apparently showing a Ukrainian soldier being beheaded by a Russian serviceman.

Ukraine's SBU security service said it was investigating the "war crime".

The Kremlin said the video was "awful" but its authenticity had to be checked as well as who was behind it.

Please subscribe here: http://bit.ly/1rbfUog

#Ukraine #Russia #BBCNews