The bitterness between these men became very public in January after the acid attack on Filin.
Shortly before the acid attack, somebody attempted to hack his Facebook page, it said.
Two people have been arrested on suspicion of involvement in an acid attack on a woman in east London.
The Bolshoi's artistic director, badly injured in an acid attack last month, has left hospital in Moscow for further treatment in Germany.
The Bolshoi Ballet's artistic director, badly injured in an acid attack last month, has left hospital in Moscow for further treatment in Germany.
Russia's Bolshoi Theatre has appointed a former prima ballerina as a temporary replacement for its artistic director who is recovering from an acid attack.
The manager of the Bolshoi Theatre has sparred in a Russian magazine with a star dancer following the acid attack on artistic director Sergei Filin.
The news that she had left Russia comes in the wake of an acid attack on the company's artistic director, Sergei Filin, earlier this month.
One of the acid attack victims featured in the documentary did not want to speak on the record as she still lives with the husband who carried out the crime.
BBC: Pakistan's Oscar triumph for acid attack film Saving Face
Two alleged co-conspirators have been detained: Alleged hit man Yuri Zarutsky -- a burly, bearded Russian who was previously convicted of beating someone to death -- and Andrey Lipatov, who allegedly drove the getaway car after Zarutksy's battery acid attack on Filin.
Police in the northern Indian state of Uttar Pradesh are investigating an attack on four sisters who suffered burns after acid was thrown at them.
BBC: India acid: Four sisters injured in Uttar Pradesh attack
Illinois-based company Renew Power has said it has already come up with a fuel cell compatible with mobile phones, by using formic acid, the chemical sprayed by black ants on the attack.
For although coal was under attack by environmentalists then, as now, for generating acid rain and other pollutants, Robertson knew it was going to be a key fuel for a long time to come.
After initially admitting to masterminding the attack, Mr Dmitrichenko later changed his testimony to saying that he had not known acid would be used in the assault.
But the Jan. 17 attack on the Bolshoi Ballet's artistic director, Sergei Filin, who had sulphuric acid thrown in his face and eyes outside his home, has cast a dark shadow on that ideal.
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