Obama warns Russia against Ukraine intervention, says 'there will be costs' - CNN

• Ousted Ukraine leader set to give news conference Friday in Russia


• "We are checking to make sure that no radicals come to Crimea from Kiev," one man says


• Ukraine has been showing a deepening schism since the president's ouster

Have you witnessed the protests in Ukraine? Share your experiences, but please stay safe.

Simferopol, Ukraine (CNN) -- Armed men in green camouflage uniforms stood guard outside the main airport in Ukraine's southern region of Crimea on Friday, but reports conflicted on whether they had taken control of the facility.

"We are checking to make sure that no radicals come to Crimea from Kiev, from the Ukraine," said one man, who didn't give his name.

"We don't want radicals, we don't want fascism, we don't want problems."

Since President Viktor Yanukovych was ousted Saturday, Ukraine has been showing a deepening schism.

Those in the west generally support the country's interim government and its tilt toward the European Union.

And many in the east prefer things as they were -- a Ukraine where its larger neighbor, Russia, casts a long shadow.

And nowhere is that feeling more intense than in Crimea, a Black Sea peninsula with an ethnic Russian majority. It's the last big bastion of opposition to the new political leadership. And there are fears that tensions in the autonomous region might escalate into a bid for separation by its Russian majority.

Voting out the premier

On Thursday, dozens of armed men seized government administration buildings in Simferopol, the Crimean capital. They planted Russia's flag atop the parliament building.

Then, in a vote of no-confidence, pro-Russian members of the Crimean parliament dismissed the government of Premier Anatolii Mohyliov, who was perceived as pro-Kiev.

The lawmakers also scheduled a referendum on greater autonomy for the region within Ukrainian territory.

The date of the referendum? May 25 -- the day Ukraine is scheduled to hold its presidential elections.

Conflicting reports

Next came the contradictory reports Friday -- both in Russian media -- about the developments at Simferopol airport.

Some news sites said the airport had been seized by pro-Russian gunmen. RIA Novosti, another Russian news site, said it spoke to airport staffers who refuted the assertion.

Yanukovych's whereabouts

Amidst the dizzying developments, Kiev has gone about its business of governing.

On Thursday, lawmakers approved opposition leader Arseniy Yatsenyuk as Prime Minister. He made clear that he believes the country's future rests in closer ties to Europe, not Russia.

Immediately, Yanukovych condemned the interim government as illegitimate.

Yanukovych, who has not been seen since his ouster, is in Russia where authorities have accepted his request for security, according to RIA Novosti, which attributed the information to anonymous government sources.

He is expected to give a news conference Friday in the the southern Russian city of Rostov-on-Don.

CNN's Ingrid Formanek reported from Simferopol and Saeed Ahmed wrote from Atlanta.

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