Masked pro Russian armed men stand at the city hall during negotiations about the release of foreign military observers being held by Ponomarev's group in Slovyansk, eastern Ukraine, Sunday, April 27, 2014. At least one of the eight European military observers held prisoner by pro-Russia insurgents in eastern Ukraine has been freed. Earlier in the day, the eight observers had been shown in public for the first time since they were detained on Friday and accused of spying for NATO. (AP Photo/Sergei Grits)
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