Ukraine President takes drug test before debating comedian in 70,000-seater stadium

Ukraine's sensational presidential election campaign took another surreal twist on Friday, as the incumbent and his comedian challenger, Volodymr Zelensky, both underwent blood tests on live television ahead of a debate.

Zelensky, a comedian with no political experience who played the role of the country's President on a sitcom for three years, is the frontrunner in the race after winning the first round of voting.

A drug and alcohol test was one of his conditions for taking part in a debate with Petro Poroshenko, as the incumbent seeks to make up ground ahead of the run-off on April 21.