Pro-Russian rebels have freed one of eight European military observers they've taken hostage in eastern Ukraine citing medical reasons, but stated they had no plans to release the other seven.
Earlier Sunday, all eight marched out in public under armed guard for the first time, and said they weren't being mistreated.
The separatists say they'll release the group of observers from the Organization for Security and Cooperation in Europe in exchange for releasing some of their own jailed activists.
The West has criticized the group's capture, and Moscow has said it is ready to help secure their release, but hasn't yet taken action.
The abductions coincide with the U.S. announcing new economic sanctions on Russia for its engagement in Ukraine.
They will target Moscow's defense industry.
Deputy U.S. national security adviser Tony Blinken said Sunday that the latest sanctions will exercise "additional pressure" on the corporate officials closest to Russian President Vladimir Putin.
It's part of a greater effort among the Group of Seven nations to punish Russia for its move on Ukraine.
Shin Se-min, Arirang News.