Pro-Russian separatist arrested by Ukrainian secret service from Brno?

The Ukrainian secret service has arrested a pro-Russian separatist who may be Czech, the news website iDnes.cz reported, quoting a report on the Ukrainian site Korrespondent.net. The man is nicknamed “the Czech” and there have been reports that he is a Brno resident named Ivo Stejskal who travelled to the region to support the separatists. However, the Ukrainian secret service issued a statement saying the detained man was Russian. The arrest was made in the Kherson Oblast, which borders with Crimea.