"He's with us. He's fine," Stella Khorosheva told the Associated Press. Khorosheva said the group, which has occupied police stations and public buildings in Sloviansk, Ukraine since last week, will continue to hold Ostrovsky until they've finished their investigation.
"(We) need to be careful because this is not the first time we're dealing with spies," she said, adding that Ostrovksy is accused of spying for Ukraine's Right Watch "and other enemy organizations."
Meanwhile, the U.S. State Department has condemned the abduction.
"We condemn any such actions, and all recent hostage-takings in eastern Ukraine, which directly violate commitments made in the Geneva joint statement," State Department spokeswoman Jen Psaki said. "We call on Russia to use its influence with these groups to secure the immediate and safe release of all hostages in eastern Ukraine."
[Image via AP]