Bolshoi director Sergei Filin 'knows' attacker
Sergei Filin believes his attackers may have been jealous of his successes at the Bolshoi Ballet, a place notorious for its infighting and rivals
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The Bolshoi Ballet's artistic director says he is "absolutely certain" he knows who is behind an acid attack that left him badly injured last month.
Sergei Filin told the BBC he would not name names until investigators are ready to make an announcement.
He said he was sure the aim of the attack was to remove him as artistic director and destroy the prestigious Moscow ballet company's reputation.
Mr Filin is due to fly to Germany next week to continue his treatment.
His eyes were badly damaged in the 17 January attack in Moscow, and he said he had already undergone five operations and was under constant monitoring.
The 42-year-old said he knew that some people had disliked the way he was taking the ballet company, which is known for its infighting and rivalries, but believed he had no "obvious enemies".
He also said he wished he had taken more seriously the months of threats and harassment he had suffered, accepting now that it was "leading up to the tragedy to come".