Former Secretary of State Madeleine Albright is in Ukraine, leading the National Democratic Institute's election observation mission.

Albright tweeted a picture from a polling station Sunday morning.

Ukraine, which has been engulfed in turmoil with Russia, is holding presidential elections Sunday after ousted President Viktor Yanukovych fled to Russia amid protests in the country.

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High turnout is reported at polling stations in Ukraine.

"These are extremely important elections. We have to make sure Ukraine becomes a truly independent country, a powerful independent state that nobody will be able to push around," pensioner Mihailo Belyk, 65, told Reuters as he voted in a southeastern district of the Kiev.

A delegation of lawmakers including Sens. Ben CardinBenjamin (Ben) Louis CardinSenate passes extension of application deadline for PPP small-business loans 1,700 troops will support Trump 'Salute to America' celebrations July 4: Pentagon GOP lawmakers voice support for Israeli plan to annex areas in West Bank MORE (D-Md.) and Rob PortmanRobert (Rob) Jones PortmanThe Hill's 12:30 Report: Democratic proposal to extend 0 unemployment checks Senate Democrats offer plan to extend added jobless benefits during pandemic Senators press IRS chief on stimulus check pitfalls MORE (R-Ohio) is also in Ukraine to help monitor the vote.

Portman tweeted that more than 100 Ukrainians "gave their lives fighting for a free & democratic Ukraine." "Their spirit lives on" through the election, he added.

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Cardin tweeted that Russia "has violated just about every agreement they've entered," adding that observers were hoping to see a "free and fair election."