Former world boxing champion and Ukrainian opposition leader Vitali Klitschko called Prime Minister Mykola Azarov's resignation "only a step to victory".

"The issue of the government's resignation and the issue of the government's liability are on today's agenda. I am certain this (resignation statement) is not accidental. He knows that he will do everything he can to save face", Klitschko told reporters on Tuesday.

"For several months we have been saying that what is happening in the streets is also the result of the policies of the current government. This is not victory, but a step to victory", said Klitschko, leader of the UDAR (Punch) party.

Earlier on Tuesday, Prime Minister Mykola Azarov offered his resignation, which under the constitution, means the departure of the whole government.