Mark Etherington, an OSCE special mission in Ukraine official, and his teammates arrive in the mayor's office in Slaviansk
Mark Etherington (front 2nd L), an Organization for Security and Cooperation in Europe (OSCE) special mission in Ukraine official, and his teammates arrive in the mayor's office in Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
TIMELINE-Ukraine crisis and Russia's stand-off with the West
UKRAINE-CRISIS/EVENTS (TIMELINE):TIMELINE-Ukraine crisis and Russia's stand-off with the West
Mark Etherington, an OSCE special mission in Ukraine official, and his teammates arrive in the mayor's office in Slaviansk
Mark Etherington (L), an Organization for Security and Cooperation in Europe (OSCE) special mission in Ukraine official, and his teammates arrive in the mayor's office in Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Ukrainian soldiers patrol through a field at a check point near Slaviansk
Ukrainian soldiers patrol through a field at a check point near Slaviansk, in eastern Ukraine April 27, 2014. The de facto mayor of the Ukrainian city of Slaviansk said on Sunday mediators from the Organisation for Security and Cooperation in Europe who are seeking the release of a group of detained observers had arrived in the city. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY TPX IMAGES OF THE DAY)
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Detained international observer arrives for a meeting with journalists in the eastern Ukrainian city of Slaviansk
A detained international observer arrives for a meeting with journalists in the eastern Ukrainian city of Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
A Ukrainian soldier stands guard at a check point near the village of Malinivka
A Ukrainian soldier stands guard at a check point near the village of Malinivka, south-east of Slaviansk, in eastern Ukraine April 27, 2014. The de facto mayor of the Ukrainian city of Slaviansk said on Sunday mediators from the Organisation for Security and Cooperation in Europe who are seeking the release of a group of detained observers had arrived in the city. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY)
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk
Detained international observers arrive for a meeting with journalists in the eastern Ukrainian city of Slaviansk April 27, 2014. The leader of the international observers detained by pro-Russian separatists in the east Ukrainian city of Slaviansk said on Sunday all the group were in good health, but they were anxious to be allowed to go home soon. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)