LONDON (Reuters) - U.S. Secretary of State John Kerry will seek assurances from Russia on Friday that it will not seek to annex Crimea and will address concerns over Ukraine through negotiation, a senior State Department official said before talks in London.
Kerry meets Russian counterpart Sergei Lavrov later in the day in last-ditch diplomatic efforts to defuse tension between Moscow and the West as a referendum in Crimea, a Russian-majority region of Ukraine, looks set to proceed on Sunday.
