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.

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 CardinCongress should take the lead on reworking a successful Iran deal 'Fix' the Iran deal, but don't move the goalposts North Korea tensions ease ahead of Winter Olympics MORE (D-Md.) and Rob PortmanRobert (Rob) Jones PortmanFlake's anti-Trump speech will make a lot of noise, but not much sense Top GOP candidate drops out of Ohio Senate race Overnight Tech: Regulators to look at trading in bitcoin futures | Computer chip flaws present new security problem | Zuckerberg vows to improve Facebook in 2018 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.

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."