A former commander of Russian ground forces with close ties to Ukraine died “suddenly” the day after Vladimir Putin abruptly cancelled a trip to the tank enterprise where he worked.
General Alexei Maslov, 69, passed away on Christmas Day in a Moscow military hospital, the Uralvagonzavod plant announced.
Maslov’s loss follows the “sudden death” of Alexander Buzakov, 65, general director of Admiralty Shipyards in St Petersburg, in charge of building new submarines.
The FSB security service had formed an “investigative group” into the two deaths, reported Telegram channel Redacted number 6.
Buzakov had been healthy the day before he died, and “nothing had been heard about Maslov's health problems” before he died, said the channel..
Maslov - pictured with Putin - had been commander-in-chief of Russian ground forces between 2004 and 2008, and later served as the country’s chief military representative to NATO in Brussels.
At NATO he worked alongside Dmitry Rogozin, an official close to Putin who was abruptly removed in the summer as head of the Russian Space Agency, Roscosmos.
Putin had been due to fly to the Uralvagonzavod plant in Nizhny Tagil - which has been criticised by the Kremlin for failing to produce sufficient new tanks for the war in Ukraine.
However the Russian president aborted the Christmas Eve trip “at the last minute” with no explanation, according to local reports.
Rogozin - recovering in hospital from injury in a Ukrainian shell attack last week - praised Maslov as “a very experienced military man, a demanding commander, and a good person”.
Buzakov’s death was described as “sudden, untimely and tragic”.
A regional politician and sausage tycoon known as Russia ’s top-earning elected representative Pavel Antov, 65, fell to his death from a window in an Indian hotel in another case that has aroused suspicion.
He had labelled Russian missile strikes on Kyiv as “terror” - before suddenly withdrawing his comment.
A series of recent giant explosions and fires at strategic locations have also raised suspicion of “sabotage” against Putin’s regime.
Anti-war channel Gorod Glypov, with more than 240,000 subscribers, described the deaths as “incomprehensible”.
It claimed a brutal process of “cleansing” to wipe out unwanted people was underway.
Russia was “in a season of accidental window falls, unexpected deaths and ‘regular’ fires”, it stated sarcastically.
The press service at Uralvagonzavod - Russia's largest tank plant - said Maslov has risen from “platoon commander to commander-in-chief of ground forces”.
He “remained faithful to the cause and the Fatherland until the last day”.
He had studied in Ukrainian city Kharkiv, and was later stationed in the Carpathian Mountains.