An injured man stands near an ambulance during clashes between pro-Russian and pro-Ukrainian supporters at a pro-Ukrainian rally in Donetsk
An injured man stands near an ambulance during clashes between pro-Russian and pro-Ukrainian supporters at a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday. REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
An injured man stands near an ambulance during clashes between pro-Russian and pro-Ukrainian supporters at a pro-Ukrainian rally in Donetsk
An injured man stands near an ambulance during clashes between pro-Russian and pro-Ukrainian supporters at a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday. REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
An injured man holds his head during clashes between pro-Russian and pro-Ukrainian supporters at a pro-Ukrainian rally in Donetsk
An injured man holds his head during clashes between pro-Russian and pro-Ukrainian supporters at a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday. REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
Ukrainian police try to stop a pro-Russian supporter from attacking a pro-Ukrainian rally in Donetsk
Ukrainian police try to stop a pro-Russian supporter from attacking a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday . REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
Ukrainian police try to stop a pro-Russian and pro-Ukrainian supporter during clashes at a pro-Ukrainian rally in Donetsk
Ukrainian police try to stop a pro-Russian (R) and pro-Ukrainian supporter during clashes at a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday. REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
Pro-Russian and pro-Ukrainian supporters clash during a pro-Ukrainian rally in Donetsk
Pro-Russian (R) and pro-Ukrainian supporters clash during a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday . REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)
Pro-Russian men attack pro-Ukrainian supporters during a pro-Ukrainian rally in Donetsk
Pro-Russian men attack pro-Ukrainian supporters during a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday . REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
Pro-Russian men holding clubs run towards Ukrainian supporters during a pro Ukrainian rally in Donetsk
Pro-Russian men holding clubs run towards Ukrainian supporters during a pro Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday . REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)
A pro-Ukrainian supporter stands in front of riot police during a pro-Ukrainian rally in Donetsk
A pro-Ukrainian supporter stands in front of riot police during a pro-Ukrainian rally in Donetsk, eastern Ukraine April 28, 2014. Several people were wounded when pro-Russian separatists attacked a rally in support of Ukrainian unity in the separatist-held city of Donetsk in eastern Ukraine on Monday. REUTERS/Baz Ratner( UKRAINE - Tags: POLITICS CIVIL UNREST)