But she said she would not call on her supporters to take to the streets in protest.

Ukraine's central election commission said on Wednesday that Yanukovych had won 48.95 per cent of the vote in the presidential poll, compared to Tymoshenko's 45.47 per cent.

Although official, the results are still preliminary and must be formally certified by the commission this month.

Tymoshenko's team has claimed widespread violations took place during voting, particularly in Yanukovych's eastern Ukraine strongholds, but international observers hailed the vote as a fair and clean.