Alexander Smelov, 55, killed in his office in Yakutsk.
The institute director was attacked in his own office on Tuesday. Picture: Institute of Diamond and Precious Metal Geology
A man was arrested on suspicion of murdering the academic, who was director of the Russian Academy of Sciences' Institute of Diamond and Precious Metal Geology in Yakutsk.
'The institute director was attacked in his own office on Tuesday. He died from his injuries,' said Stanislav Platonov, spokesman for the Interior Ministry in the Sakha Republic, also known as Yakutia.
The suspect, a postgraduate student in the institute, was detained in his apartment, reported Interfax.
Documents concerning the case have been forwarded to the Russian Investigative Committee's regional branch.
Investigators also find the lover of the mass murderer's wife: Mikhail Popkov claims his jealously led to him slaughtering at least 81 women.
Grigory Akhara, 21, was unconscious but alive when driver Ulyana Lobanova, 30, and her foul-mouthed husband Roman, 42, refused to back-up.
New confessions mean his female victims now number 69, with at least a dozen more charges expected soon, taking his macabre toll to 81.
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