Ukraine crisis: 'UN position as mediator undermined'
3 March 2014 Last updated at 08:00 GMT
The UN has undermined its position as a "mediator" in Ukraine, Dmitry Babich from the radio station Voice of Russia has said.
He claimed this was a result of its inability to fulfil an agreement over the "division of powers" in the country in February.
His comments come as Russian military forces continue to strengthen their grip on the Crimean peninsula.
Mr Babich also told the Today programme that both Russia and the West have committed a "clear breach of war".
First broadcast on BBC Radio 4's Today programme on Monday 3 March.