Appearing haggard and unkempt, Pavel Dmitrichenko was shown in a police video confessing to plotting the attack, in which a masked man threw a jar of sulphuric acid in the face of artistic director Sergei Filin on January 17th.
"I organised this attack, but not to the extent that it happened," he said, apparently meaning he did not intend the attack to go so far.
Two other men who had no known connection to the Bolshoi also confessed in the video released by police.
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Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.