A senior Ukrainian diplomat says Europe would be haunted forever if the West gives up on Ukraine and allows the country to be split by Russia.

Ukraine has asked for arms supplies but EU countries have been divided on how to respond.

Olexander Scherba, ambassador-at-large at the Ukrainian foreign ministry, told HARDtalk's Stephen Sackur the West looked weak in its response to the crisis. He said Russia was "power drunk" and trying to punish Ukraine for its democratic choice.

Watch more clips at HARDtalk's website.

You can see the full interview with Olexander Scherba on BBC World News at 20:30 GMT on Tuesday 2 September and again at 03:30, 08:30, 14:30 and 20:30 GMT on Wednesday 3 September. It can also be seen on the BBC News Channel at 00:30 and 04:30 BST on Wednesday 3 September.