The multimillionaire's body was discovered floating in a swimming pool, tvp.info reported on Wednesday.
There were gunshot wounds to his head and a pistol is said to have been found nearby, according to tvp.info.
Police are treating the death as suicide, tvp.info reported.
Voronov’s relatives have reportedly told police that he believed he was being swindled by business partners and contractors, tvp.info said.
Voronov, 61, was director general of logistics firm Astra-Shipping, a contractor for Gazprom, according to tvp.info.
Astra-Shipping’s losses between 2020 and 2021 totalled 160 million roubles (EUR 2.5 million), tvp.info reported, citing Russian media.
Suspicious deaths among Russian oligarchs
Voronov’s passing is the latest in a series of suspicious deaths of Russian millionaires from the energy sector, tvp.info reported.
In February, a senior Gazprom financial and security official, Alexander Tyulakov, aged 61, was found dead in his mansion a day after Vladimir Putin invaded Ukraine, according to tvp.info.
In January, Leonid Shulman, 60, a high-level manager at Gazprom Invest, was found stabbed to death on his bathroom floor in the same St. Petersburg suburb as Voronov, tvp.info reported.
In April, Vladislav Avayev, 51, a former Kremlin official with high-level links to Gazprombank, appeared to have committed suicide after killing his wife and daughter, tvp.info wrote.
Days later, multimillionaire Sergey Protosenya, 55, a former deputy chairman of the Kremlin-linked Novatek company, was found dead in Spain, according to tvp.info.
Protosenya was found dead alongside the bodies of his wife and teenage daughter, tvp.info reported.
Source: tvp.info, dw.com