The Security Service of Ukraine said on March 31 that it had stopped a Russian man who investigators believe was planning to forcibly take over government buildings in Kyiv in an effort to destabilize the country.

Ukraine’s security service, known by the acronym SBU, said in a statement on its website that it had detained Oleg Bakhtiyarov, a leader of the extremist Eurasian Youth Union of Russia, for allegedly planning to storm the country’s parliament and Cabinet of Ministers buildings in Kyiv by force.