KIEV: Polls opened Sunday in Ukraine's presidential elections which are expected to see a comeback by pro-Russian forces five years after the Orange Revolution.

Polls opened at 0600 GMT and were due to close 12 hours later when exit polls are expected to give the first indication of early trends.

The pro-Russia Viktor Yanukovich is expected to lead the poll but without winning an overall majority, forcing a second round run-off on February 7 against the likely second place candidate Prime Minister Yulia Tymoshenko.