Russian Jotman contributor Sanjuro reports that
A noted member of the Antifa (Russian anti-nazi) movement was found dead last night, Mr. Ivan Khutorskoy. Mr Khutorskoy was a co-founder of the leftwing RASH faction (Red and Anarchist Skinheads) within the Antifa. He was an athlete, a mixed martial artist, who survived several earlier attacks and assassination attempts, until he was shot dead in his own building. He was a particularly valued member of the small Antifa movement as a capable fighter who helped organize security efforts during anti-nazi gatherings. There is a short obituary both in Russian and English here.
It is believed that Khutorskoy's murder could be partially inspired as revenge for the arrest of two neonazists in connection with the murder of lawyer Stanislav Markelov and journalist Anastasia Baburova.