Armed pro-Russian activists speak with their friends near the seized regional government headquarters in Luhansk
Armed pro-Russian activists speak with their friends near the seized regional government headquarters in Luhansk, eastern Ukraine, May 3, 2014. A gunfight started between pro-Russian activists and what witnesses say are Ukrainian police, near the building of the regional military commissariat. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
OSCE observer Schneider leaves the plane in Berlin's Tegel airport
OSCE observer Axel Schneider leaves the plane in Berlin's Tegel airport, May 3, 2014. A group of military observers who were seized last week by pro-Russian separatists in the eastern Ukrainian city of Slaviansk has been released, the Organization for Security and Cooperation in Europe (OSCE) confirmed on Saturday. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS CIVIL UNREST)
OSCE observer Schneider is greeted by Wieker, German army chief of staff, as Defence Minister von der Leyen stands behind in Berlin's Tegel airport
OSCE observer Axel Schneider (2R) is greeted by Volker Wieker (L), German army Bundeswehr chief of staff, as German Defence Minister Ursula von der Leyen (R) stands behind in Berlin's Tegel airport, May 3, 2014. A group of military observers who were seized last week by pro-Russian separatists in the eastern Ukrainian city of Slaviansk has been released, the Organization for Security and Cooperation in Europe (OSCE) confirmed on Saturday. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS CIVIL UNREST)
Dozens killed in Ukraine fighting and fire; OSCE monitors freed
UKRAINE-CRISIS/ (WRAPUP 5, REPEAT)=2:RPT-WRAPUP 5-Dozens killed in Ukraine fighting and fire; OSCE monitors freed
German Defence Minister von der Leyen walks with OSCE observer Schneider in Berlin's Tegel airport
German Defence Minister Ursula von der Leyen walks with OSCE observer Axel Schneider in Berlin's Tegel airport, May 3, 2014. A group of military observers who were seized last week by pro-Russian separatists in the eastern Ukrainian city of Slaviansk has been released, the Organization for Security and Cooperation in Europe (OSCE) confirmed on Saturday. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS CIVIL UNREST)
Released OSCE observers are greeted by officials and friends in Berlin's Tegel airport
Released OSCE observers are greeted by officials and friends in Berlin's Tegel airport, May 3, 2014. A group of military observers who were seized last week by pro-Russian separatists in the eastern Ukrainian city of Slaviansk has been released, the Organization for Security and Cooperation in Europe (OSCE) confirmed on Saturday. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS CIVIL UNREST)
An armed pro-Russian patrols a street near the seized regional government headquarters in Luhansk, eastern Ukraine
An armed pro-Russian patrols a street near the seized regional government headquarters in Luhansk, eastern Ukraine, May 3, 2014. A gunfight started between pro-Russian activists and what witnesses say are Ukrainian police, near the building of the regional military commissariat. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
OSCE observer Schneider leaves the plane in Berlin's Tegel airport
OSCE observer Axel Schneider leaves the plane in Berlin's Tegel airport, May 3, 2014. A group of military observers who were seized last week by pro-Russian separatists in the eastern Ukrainian city of Slaviansk has been released, the Organization for Security and Cooperation in Europe (OSCE) confirmed on Saturday. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS CIVIL UNREST)
German Defence Minister von der Leyen presents OSCE observer Schneider to officials in Berlin's Tegel airport
German Defence Minister Ursula von der Leyen (4L) presents OSCE observer Axel Schneider (5L) to officials in Berlin's Tegel airport, May 3, 2014. A group of military observers who were seized last week by pro-Russian separatists in the eastern Ukrainian city of Slaviansk has been released, the Organization for Security and Cooperation in Europe (OSCE) confirmed on Saturday. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS CIVIL UNREST)
Armed pro-Russian activists stand near the seized regional government headquarters in Luhansk, eastern Ukraine
Armed pro-Russian activists stand near the seized regional government headquarters in Luhansk, eastern Ukraine, May 3, 2014. A gunfight started between pro-Russian activists and what witnesses say are Ukrainian police, near the building of the regional military commissariat. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)