The outgoing president of Ukraine, Leonid Kuchma, says there will not be a revolution in his country over the nation's hotly contested presidential election.

On the eve of Sunday's run-off vote, President Kuchma said in a televised address that authorities will not allow instability to erupt over the vote.

Opposition candidate Viktor Yushchenko has warned that his supporters will stage massive demonstrations if electoral fraud is discovered.

The United States has warned it will review its relations with Ukraine if the election fails to be free or fair.

Mr. Yushchenko, with just under 40 percent support, edged out Prime Minister Viktor Yanukovych by a half of percentage point in the first round of voting on October 31.

International observers said the October balloting fell short of democratic standards.

Some information provided by AP and AFP.