Sergei Filin was attacked as he left his home in Moscow on Friday night . The unidentified assailant threw concentrated acid in his face , causing severe burns . Filin had faced intimidation , including threatening phone calls , state media say .
Sergei Filin was attacked as he approached his home in Moscow on Thursday night . The unidentified assailant threw concentrated acid in his face , causing severe burns . Filin had suffered intimidation , including threatening phone calls , state media say .