A sailor works on board the Ukrainian navy ship Slavutych in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers stand guard on board the Ukrainian navy ship Ternopil docked in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian soldier stands guard on board the Ukrainian navy ship Ternopil docked in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian soldier raises a Ukrainian navy flag as he stands guard on board the navy ship Ternopil docked in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian soldier stands guard on board the Ukrainian navy ship Ternopil docked in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian soldier stands guard on board the Ukrainian navy ship Ternopil docked in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian officers raise a navy flag as they stand guard on board the Ukrainian navy ship Slavutych in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian soldier stands guard on board the Ukrainian navy ship Slavutych in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers stand guard on board the Ukrainian navy ship Slavutych in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian navy sailor boards the Ukrainian navy ship Slavutych in the port of Sevastopol, where a Ukrainian navy base is located, on March 6, 2014. Ukraine accused Russia of stoking tensions today as the UN Security Council and European leaders held emergency talks, while OSCE monitors were expected in Crimea in a mission to defuse tensions. AFP PHOTO / FILIPPO MONTEFORTE

Armed Ukrainian seamen stand on alert in case their vessel is assaulted by Russian troops, in Sevastopol, Ukraine, on Wednesday, March 5, 2014. Ukraine's new prime minister said Wednesday that embattled Crimea must remain part of Ukraine, but may be granted more local powers. Since last weekend, Russian troops have taken control of much of the peninsula in the Black Sea, where Russian speakers are in the majority. (AP Photo/Ivan Sekretarev)

An Ukrainian soldier onboard the navy ship Slavutich looks at Russian forces patrolling in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers onboard the navy ship Slavutich look out at Russian forces patrolling in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers onboard the navy ship Slavutich stand guard as they look out at Russian forces patrolling in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers stand guard on board the navy corvette Ternopil as Russian forces patrol nearby in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers stand guard on board the navy corvette Ternopil as Russian forces patrol nearby in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers stand guard on board the navy corvette Ternopil as Russian forces patrol nearby in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers onboard the navy ship Slavutich stand guard as they look out at Russian forces patrolling in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers stand guard on board the navy corvette Ternopil as Russian forces patrol nearby in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian soldier (Top) onboard the navy ship Slavutich stands guard as he looks out at Russian forces (Bottom) patrolling in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

Ukrainian soldiers onboard the navy ship Slavutich stand guard as Russian forces patrol nearby in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

TOPSHOTS Ukrainian soldiers stand guard on board the navy corvette Ternopil as Russian forces patrol nearby in the harbor of the Ukrainian city of Sevastopol on March 5, 2014. The Ukrainian soldiers hung matresses on the edge of the navy ship's railing to prevent Russian forces from forcefully boarding the ship with grappling hooks. Russian forces seized partial control of two Ukrainian missile bases in Crimea today as Western and Russian leaders stepped up efforts to defuse the region's worst crisis since the Cold War. AFP PHOTO / FILIPPO MONTEFORTE

A Ukrainian national flag flies on the board of Ukrainian navy ship Slavutich, at harbor of in Sevastopol, Ukraine, Tuesday, March 4, 2014. Crimea still remained a potential flashpoint. Pro-Russian troops who had taken control of the Belbek air base in Crimea fired warning shots into the air Tuesday as around 300 Ukrainian soldiers, who previously manned the airfield, demanded their jobs back.(AP Photo/Andrew Lubimov)

A Ukrainian national flag flies on the board of Ukrainian navy ship Slavutich, at harbor of in Sevastopol, Ukraine, Tuesday, March 4, 2014. Crimea still remained a potential flashpoint. Pro-Russian troops who had taken control of the Belbek air base in Crimea fired warning shots into the air Tuesday as around 300 Ukrainian soldiers, who previously manned the airfield, demanded their jobs back.(AP Photo/Andrew Lubimov)