Ukrainian President Petro Poroshenko gestures while speaking at his headquarters after the presidential election in Kiev, Ukraine, Sunday, March 31, 2019. The exit poll released Sunday after voting stations closed indicated that Volodymyr Zelenskiy received a majority of votes in the nationwide vote. (AP Photo/Efrem Lukatsky)

KIEV, Ukraine - A comedian with no political experience was leading in Ukraine's presidential election on Sunday, an exit poll and partial early results indicated, but was far short of the absolute majority needed to win outright in the first round.

With 11 per cent of the ballots counted, Volodymyr Zelenskiy had more than 29 per cent of the votes, while incumbent President Petro Poroshenko was in a distant second place followed by former Prime Minister Yulia Tymoshenko with about 17 and 14 per cent respectively, the national elections commission said. The results were closely in line with a major exit poll.

The top two candidates will face off in a presidential runoff on April 21. Final results in Sunday's first round are expected to be announced Monday morning.

The election was shadowed by allegations of widespread vote buying. Police said they had received more than 2,100 complaints of violations on voting day alone in addition to hundreds of earlier voting fraud claims, including bribery attempts and removing ballots from polling places.

Zelenskiy stars in a TV sitcom about a teacher who becomes president after a video of him denouncing corruption goes viral and his supporters hold out hope that he can fight corruption in real life.

"This is only the first step to a great victory," Zelenskiy told reporters after the exit poll was announced.

"Zelenskiy has shown us on the screen what a real president should be like," said voter Tatiana Zinchenko, 30, who cast her ballot for the comedian. "He showed what the state leader should aspire for — fight corruption by deeds, not words, help the poor, control the oligarchs."

Campaign issues in the country of 42 million included Ukraine's endemic corruption, its struggling economy and a seemingly intractable conflict with Russia-backed separatists in eastern Ukraine that has killed 13,000 people since 2014.

Concern about the election's legitimacy have spiked in recent days after Ukraine's interior minister said his department was "showered" with hundreds of claims that supporters of Poroshenko and Tymoshenko had offered money in exchange for votes.

Like the popular character he plays, Zelenskiy, 41, made corruption a focus of his candidacy. He proposed a lifetime ban on holding public office for anyone convicted of graft. He also called for direct negotiations with Russia on ending the conflict in eastern Ukraine.

"A new life, a normal life is starting," Zelenskiy said after casting his ballot in Kyiv. "A life without corruption, without bribes."

His lack of political experience helped his popularity with voters amid broad disillusionment with the country's political elite.

Poroshenko said "I feel no kind of euphoria" after the exit poll results were announced.

"I critically and soberly understand the signal that society gave today to the acting authorities," he said.

It is not clear whether he would or could adjust his campaign enough to meet Zelenskiy's challenges over the next three weeks.

Poroshenko, 53, a confectionary tycoon when he was elected five years ago, pushed successfully for the Ukrainian Orthodox Church to be recognized as self-standing rather than a branch of the Russian church.

However, he saw approval of his governing sink amid Ukraine's economic woes and a sharp plunge in living standards. Poroshenko campaigned on promises to defeat the rebels in the east and to wrest back control of Crimea, which Russia annexed in 2014 in a move that has drawn sanctions against Russia from the U.S. and the European Union.

Speaking at a polling station Sunday, the president echoed his campaign promises of taking Ukraine into the EU and NATO.

The president's priorities persuaded schoolteacher Andriy Hristenko, 46, to vote for him

"Poroshenko has done a lot. He created our own church, bravely fought with Moscow and is trying to open the way to the EU and NATO," Hristenko said.

Ukraine's former prime minister, Tymoshenko, shaped her message around the economic distress of millions in the country.

"Ukraine has sunk into poverty and corruption during the last five years, but every Ukrainian can put an end to it now," she said after voting Sunday.

During the campaign, Tymoshenko denounced price hikes introduced by Poroshenko as "economic genocide" and promised to reduce prices for household gas by 50 per cent within a month of taking office.

"I don't need a bright future in 50 years," said Olha Suhiy, a 58-year-old cook. "I want hot water and heating to cost less tomorrow."

A military embezzlement scheme that allegedly involved top Poroshenko associates as well as a factory controlled by the president dogged Poroshenko before the election. Ultra-right activists shadowed him throughout the campaign, demanding the jailing of the president's associates accused in the scandal.

Zelenskiy and Tymoshenko both used the alleged embezzlement to take hits at Poroshenko, who shot back at his rivals. He described them as puppets of a self-exiled billionaire businessman Igor Kolomoyskyi, charges that Zelenskiy and Tymoshenko denied.

Many political observers have described the presidential election as a battle between Poroshenko and Kolomoyskyi.

Both the president and the comedian relied on an arsenal of media outlets under their control to exchange blows. Just days before the election, the TV channel Kolomoyskyi owns aired a new season of the "Servant of the People" TV series in which Zelenskiy stars as Ukraine's leader.

"Kolomoyskyi has succeeded in creating a wide front against Poroshenko," said Vadim Karasyov, head of the Institute of Global Strategies, an independent Kyiv-based think-tank . "Ukraine has gone through two revolutions, but ended up with the same thing — the fight between the oligarchs for the power and resources."

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Mstyslav Chernov in Kyiv, and Jim Heintz and Vladimir Isachenkov in Moscow, contributed to this report.

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A previous version of this story removed Kolomoyskyi falling off Forbes' list of billionaires; the reference was to Poroshenko but an editing error applied it to Kolomoyskyi.

News from © The Associated Press, 2019