Ukrainian Prime Minister Yulia Tymoshenko is looking to the country's top court to overturn the results of the recent presidential elections. Rival Viktor Yanukovych is set to be inaugurated at the end of the month.

• 15 February 2010

After three days of silence, the Ukrainian prime minister, Yulia Tymoshenko, has spoken out in defiance, refusing to accept the victory of Viktor Yanukovych in the presidential race.

• 11 February 2010

Opposition candidate Viktor Yanukovych has narrowly defeated Prime Minister Yulia Tymoshenko in Ukraine's presidential race, prompting him to demand Tymoshenko concede defeat and resign as prime minister.

• 10 February 2010

Viktor Yanukovych, winner of Ukraine's presidential election, calls on rival Yulia Tymoshenko to abandon her protests and resign as PM.

• 10 February 2010

A preliminary vote count shows opposition candidate Viktor Yanukovych has narrowly defeated Prime Minister Yulia Tymoshenko in Ukraine's presidential race. Tymoshenko has said she will challenge the results.

• 10 February 2010

Viktor Yanukovych has won the presidential election in Ukraine. The pro-Russian former Prime Minister defeated rival Yulia Tymoshenko in a tight race.

• 9 February 2010

Ukraine's election commission has declared Viktor Yanukovych the winner of the presidential elections, but opponent and Prime Minister Yulia Tymoshenko said she will "never recognize" the legitimacy of the election.

• 9 February 2010

Ukraine and Russia trade spying accusations as Kiev expels four Russians and detains another on suspicion of espionage.

• 2 February 2010