Well known pro-Russian activist Konstantin Dolgoff claims that he called Russia's Investigative Committee and specifically requested Goncharenko's arrest.
"An hour ago I called the representative for the Russian Investigative Committee with the request to detain Oleksiy Goncharenko," he writes. "And there it is -- just got information that Goncharenko's been detained."
Here is today's map of the security situation in eastern Ukraine, according to the National Security and Defense Council:
Today is a day of action and awareness for Nadia Savchenko, the Ukrainian military pilot who was captured by pro-Russian separatists in Ukraine in June, then showed up in Russia in July in Russian custody. She is accused of having a part in the death of Russian journalists killed in Ukraine.