The leaders of Ukraine's opposition factions, Arseniy Yatseniuk (Batkivschyna faction), Vitali Klitschko (UDAR), and Oleh Tiahnybok (Svoboda) signed a declaration on the coordination of their actions at the presidential election during a rally in Kyiv on Saturday.

"The three opposition parties will coordinate their actions at all stages of the campaign to elect a new head of state. If the existing procedure of the presidential elections is maintained, each of the three political forces will support the candidate from the one of these forces that wins through to the run-off election," the declaration reads.

If Yanukovych's regime pushes through parliament a law on holding the presidential elections in one round, Batkivschyna, UDAR and Svoboda will agree on a single candidate in the first round of the election.