A top Russian cyberintelligence officer who US officials say lead last year's election hacking was arrested this week. Sergei Mikhailov, a senior member of the Federal Security Service (FSB), is charged with treason. For now, one Russian newspaper reports indicate that the arrest isn't related to election hacking. According to an article in Kommersant, the arrest stems from Mikhailov's work on criminal hacking investigations. However, Moscow Times reports the senior officer was arrested on suspicion of leaking information to US intelligence officials.