Unidentified soldiers block a road to Ukrainian military airport Belbek not far from Sevastopol on February 28, 2014. Ukraine accused Russia of staging an "armed invasion" of Crimea on Friday and appealed to the West to guarantee its territorial integrity after pro-Moscow gunmen took control of the peninsula's main airport. Unidentified armed men were patrolling outside of Crimea's main airport early Friday while gunmen were also reported to have seized another airfield on the southwest of the peninsula where ethnic Russians are a majority and where pro-Moscow sentiment runs high. AFP PHOTO/ VASILIY BATANOV

One of the unidentified armed men patrols outside of Simferopol airport, on February 28, 2014. Ukraine accused today Russia of staging an "armed invasion" of Crimea and appealed to the West to guarantee its territorial integrity after pro-Moscow gunmen took control of the peninsula's main airport.AFP PHOTO / VIKTOR DRACHEV

Unidentified armed men patrol outside of Simferopol airport, on February 28, 2014. Ukraine accused today Russia of staging an "armed invasion" of Crimea and appealed to the West to guarantee its territorial integrity after pro-Moscow gunmen took control of the peninsula's main airport.AFP PHOTO / VIKTOR DRACHEV

Unidentified armed men patrol outside of Simferopol airport on February 28, 2014. Ukraine accused today Russia of staging an "armed invasion" of Crimea and appealed to the West to guarantee its territorial integrity after pro-Moscow gunmen took control of the peninsula's main airport. AFP PHOTO/ GENYA SAVILOV

Unidentified gunmen wearing camouflage uniforms block the road toward the military airport at the Black Sea port of Sevastopol in Crimea, Ukraine, Friday, Feb. 28, 2014. Heightened security is evident with Russian military around Sevastopol, the location for Russia military bases, military airport and Naval Base, while unidentified armed men wearing uniforms without insignia were patrolling another airport serving the regional capital, Ukraine's new Interior Minister Arsen Avakov said on Friday. (AP Photo/Ivan Sekretarev)

Unidentified armed men patrol in front of the airport in Simferopol, Ukraine, Friday, Feb. 28, 2014. Russian troops took control of the two main airports in the strategic peninsula of Crimea, Ukraine's interior minister charged Friday, as the country asked the U.N. Security Council to intervene in the escalating conflict. Russian state media said Russian forces in Crimea denied involvement. No violence was reported at the civilian airport in Crimea's capital of Simferopol or at the military airport in the Black Sea port of Sevastopol, also part of Crimea. At the Simferopol airport, a man claiming to speak for the camouflage-clad forces patrolling the airport described them as Crimean militiamen. (AP Photo/Darko Vojinovic)