A woman sweeps away the broken glass as two unidentified armed men guard the entrance to the local government building in downtown Simferopol, Ukraine, on Sunday, March 2, 2014. A convoy of hundreds of Russian troops headed toward Simferopol the regional capital of Ukraine's Crimea region on Sunday, a day after Russia's forces took over the strategic Black Sea peninsula without firing a shot. (AP Photo/Ivan Sekretarev)

ALTERNATIVE CROP A Russian flag flies in the foreground as unidentified armed men in uniform block a Ukrainian military base near the village of Perevalne, 20 km south of Simferopol, on March 2, 2014. A group of 1,000 armed men were blocking the entrance to a unit of Ukraine's border guards in a tense standoff in the south of the flashpoint Crimea peninsula on March 2, the defence ministry said. "One thousand armed fighters and around 20 trucks are blocking the perimetre of the 36th brigade of border guards... in Perevalne," the ministry said in a statement, as tensions remain high after Russia's parliament approved the deployment of troops in Ukraine. It did not indicate what nationality the armed men were. AFP PHOTO/ GENYA SAVILOV

An elderly man holds a Russian flag as unidentified armed men in uniform block a Ukrainian military base near the village of Perevalne, 20 km south of Simferopol, on March 2, 2014. A group of 1,000 armed men were blocking the entrance to a unit of Ukraine's border guards in a tense standoff in the south of the flashpoint Crimea peninsula on March 2, the defence ministry said. "One thousand armed fighters and around 20 trucks are blocking the perimetre of the 36th brigade of border guards... in Perevalne," the ministry said in a statement, as tensions remain high after Russia's parliament approved the deployment of troops in Ukraine. It did not indicate what nationality the armed men were. AFP PHOTO/ GENYA SAVILOV

Pro-Russian activists stand guard in front of armed men in military fatigues blocking access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 3, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards since yesterday in a tense standoff in the flashpoint Crimea peninsula. Russian troops and military planes were flowing into Crimea today in violation of accords between the two countries, Ukrainian border guards said. AFP PHOTO / ALEXANDER NEMENOV

Unidentified armed men prepare their camp in front of Ukraine's infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen arrived outside Ukraine's infantry base in Privolnoye in its Crimea region. The convoy includes at least 13 troop vehicles each containing 30 soldiers and four armored vehicles with mounted machine guns. The vehicles ? which have Russian license plates ? have surrounded the base and are blocking Ukrainian soldiers from entering or leaving it. (AP Photo/Darko Vojinovic)

An unidentified armed man guards the gate of Ukraine's infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen arrived outside Ukraine's infantry base in Privolnoye in its Crimea region. The convoy includes at least 13 troop vehicles each containing 30 soldiers and four armored vehicles with mounted machine guns. The vehicles ? which have Russian license plates ? have surrounded the base and are blocking Ukrainian soldiers from entering or leaving it. (AP Photo/Darko Vojinovic)

An unidentified armed man stands guard outside a Ukraine infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen arrived outside Ukraine's infantry base in Privolnoye in its Crimea region. The convoy includes at least 13 troop vehicles each containing 30 soldiers and four armored vehicles with mounted machine guns. The vehicles ? which have Russian license plates ? have surrounded the base and are blocking Ukrainian soldiers from entering or leaving it. (AP Photo/Darko Vojinovic)

A group of armed unidentified gunmen cut electric power to General Headquarters of the Ukrainian Naval forces in Sevastopol,Ukraine Sunday, March 2, 2014. Russian President Vladimir Putin has defied calls from the West to pull back his troops, insisting that Russia has a right to protect its interests and the Russian-speaking population in Crimea and elsewhere in Ukraine.(AP Photo/Andrew Lubimov)

A group of armed unidentified gunmen cut electric power to General Headquarters of the Ukrainian Naval forces in Sevastopol, Sunday, March 2, 2014. Russian President Vladimir Putin has defied calls from the West to pull back his troops, insisting that Russia has a right to protect its interests and the Russian-speaking population in Crimea and elsewhere in Ukraine.(AP Photo/Andrew Lubimov)

Unidentified armed and uniformed men guard the Crimean Cabinet of Ministers building in Simferopol on March 2, 2014. Armed pro-Russia men who had besieged Crimea's local parliament mysteriously vanished on March 2 but were still standing guard outside the regional government, as the capital of Ukraine's restive Black Sea peninsula remained calm but tense. AFP PHOTO/ GENYA SAVILOV

Unidentified armed men guard the entrance to the local government building in downtown Simferopol, Ukraine, on Sunday, March 2, 2014. A convoy of hundreds of Russian troops headed toward Simferopol the regional capital of Ukraine's Crimea region on Sunday, a day after Russia's forces took over the strategic Black Sea peninsula without firing a shot. (AP Photo/Ivan Sekretarev)

Armed men in military fatigues block access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

Armed men in military fatigues block access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

Armed men in military fatigues block access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

Armed men in military fatigues block access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

Unidentified armed men guard Ukraine's infantry base in Perevalne, Ukraine, Sunday, March 2, 2014. Hundreds of armed men in trucks and armored vehicles surrounded a Ukrainian military base Sunday in Crimea, blocking its soldiers from leaving. The outnumbered Ukrainians placed a tank at the base's gate, leaving the two sides in a tense standoff. (AP Photo/Darko Vojinovic)

A Russian and a Ukrainian flag float side by side as armed men in military fatigues block access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

A Russian and a Ukrainian flag float side by side as a man watches armed men in military fatigues blocking access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

An Orthodox priest holds a crucifix next to one of many armed men in military fatigues blocking access to a Ukrainian border guards base not far from the village of Perevalne near Simferopol on March 2, 2014. About 1,000 armed men surrounded the base of the 36th detached brigade of the Ukrainian Navy's coastal guards today in a tense standoff in the flashpoint Crimea peninsula. Ukraine's new leaders announced a full mobilisation of the army today, a day after Moscow officially approved the deployment of its troops to its western neighbour. AFP PHOTO / GENYA SAVILOV

Unidentified armed men patrol around a Ukraine infantry base in Perevalne, Ukraine, Sunday, March 2, 2014. Hundreds of armed men in trucks and armored vehicles surrounded the Ukrainian military base Sunday in Crimea, blocking its soldiers from leaving. The outnumbered Ukrainians placed a tank at the base's gate, leaving the two sides in a tense standoff. (AP Photo/Darko Vojinovic)