(BBC) - The incoming Russian President, Dmitry Medvedev, has said his country is not happy about the prospect of Ukraine and Georgia joining Nato.
Speaking in an interview with the Financial Times of London, he said such a move could affect European security.
Mr Medvedev said no country would be happy about a military bloc to which it did not belong approaching its borders.
Asked about recent troubled relations with the UK, he said he was open to restoring full co-operation.
Mr Medvedev is succeeding Vladimir Putin after winning a landslide victory in the presidential election earlier this month.
He has pledged to continue the policies of Mr Putin who is expected to become his prime minister.
The issue of admitting Georgia and Ukraine is expected to be discussed at a Nato summit in Bucharest on 2-4 April.
In a separate development, direct flights between Russia and Georgia are expected to resume on Tuesday, 18 months after Moscow suspended them in a row over alleged spying.
A Georgian passenger plane will fly from Tbilisi to Moscow, returning later in the day.