Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" enter the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE

Members of the so-called pro-Russian "Crimean people's self-defence forces" stand outside the main military hospital in Simferopol on March 10, 2014. Ukraine sought urgent Western backing after Russian President Vladimir Putin insisted that Crimea had the right to join his country even while hinting at a readiness for dialogue. AFP PHOTO/Filippo MONTEFORTE