Kiev: Heavyweight boxing world champion Vitali Klitschko on Tuesday announced that he will run for Ukraine's presidency in elections scheduled for May 25.

"I will be on the ballot for the post of president of Ukraine," the protest leader told journalists in parliament.

Klitschko, a central figure in anti-government demonstrations over the past few months could replace ousted leader Viktor Yanukovych, who is currently on the run and facing mass murder charges.

The Ukrainian Central Election Commission posted a calendar online early today, which gives candidates until 4 April to register for the May elections.

Speaking to the BBC on Sunday, Klitschko had suggested he could well be in the running to replace Mr Yanukovych if presidential elections were arranged.

"We don't have much time," he had said, referring to the vote. "I want to make Ukraine a modern European country. If I can do that through the president's position, I will do my best."