Germany advises against travel to east Ukraine, says media at risk
UKRAINE-CRISIS/GERMANY-TRAVEL (URGENT):Germany advises against travel to east Ukraine, says media at risk
Participants wave flags during a pro-Russian support rally in eastern Ukranian city of Kharkiv
Participants wave flags during a pro-Russian support rally in eastern Ukranian city of Kharkiv April 27, 2014. U.S. President Barack Obama on Sunday said the United States and Europe must join forces to impose sanctions on Russia to stop it destabilising Ukraine, where armed pro-Russian separatists were for a third day holding eight international observers prisoner. REUTERS/Stringer (UKRAINE - Tags: POLITICS CIVIL UNREST)
Detained observer says separatists guaranteed group's safety
UKRAINE-CRISIS/OBSERVERS-GUARANTEE (URGENT):Detained observer says separatists guaranteed group's safety
Observer held in Ukraine says group unharmed, in good health
UKRAINE-CRISIS/OBSERVERS-AXEL (URGENT):Observer held in Ukraine says group unharmed, in good health
A Ukrainian soldier patrols near a checkpoint outside the city of Slaviansk
A Ukrainian soldier patrols near a checkpoint outside the city of Slaviansk April 27, 2014. The leader of separatist rebels holding a group of international observers in the Ukrainian city of Slaviansk said he was scheduled on Sunday to meet a delegation of mediators who were on their way to negotiate the observers' release. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY)
Ukrainian soldiers stand guard near an armoured personnel carrier at a checkpoint outside the city of Slaviansk
Ukrainian soldiers stand guard near an armoured personnel carrier at a checkpoint outside the city of Slaviansk April 27, 2014. The leader of separatist rebels holding a group of international observers in the Ukrainian city of Slaviansk said he was scheduled on Sunday to meet a delegation of mediators who were on their way to negotiate the observers' release. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY)
Ukrainian soldiers stand guard at a checkpoint outside the city of Slaviansk
Ukrainian soldiers stand guard at a checkpoint outside the city of Slaviansk April 27, 2014. The leader of separatist rebels holding a group of international observers in the Ukrainian city of Slaviansk said he was scheduled on Sunday to meet a delegation of mediators who were on their way to negotiate the observers' release. The sign reads, "Stop!!! Mines" REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Ukraine separatist to meet negotiators over detained observers
UKRAINE-CRISIS/SLAVIANSK-PONOMARYOV (UPDATE 1):UPDATE 1-Ukraine separatist to meet negotiators over detained observers
Ukraine separatist holding foreign observers to meet negotiators
UKRAINE-CRISIS/SLAVIANSK-PONOMARYOV (URGENT):Ukraine separatist holding foreign observers to meet negotiators