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 CardinBen CardinBoth sides of the aisle agree — telemedicine is the future Republicans get agreement on Russia, North Korea sanctions Congress can send a powerful message by passing the Israel Anti-Boycott Act MORE (D-Md.) and Rob PortmanRob PortmanSenate heading for late night ahead of ObamaCare repeal showdown Senate releases 'skinny' ObamaCare repeal bill Overnight Healthcare: Four GOP senators threaten to block 'skinny' repeal | Healthcare groups blast skinny repeal | GOP single-payer amendment fails in Senate 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."