Voronov's wife reportedly told police that the founder and general director of the Astra-Shipping transport and logistics company had fallen out with business partners over money.
Moscow has cut gas to Poland and Bulgaria, raising concerns over which other countries might face a halt to energy supplies.
Polish Climate Minister Anna Moskwa said "there will be no shortage of gas in Polish homes" after Russian energy giant Gazprom halted exports.
Shell's exit from the country means that the company has pulled out of the controversial Nord Stream 2 pipeline.
European imports of Russian gas through Ukraine spiked by almost 38 percent on Thursday
The president warned Americans to leave Ukraine amid the threat of an invasion by Russia, which is stepping up pressure on Europe's gas supplies as leverage.
Berlin's move to not send weapons to Ukraine has been raising some questions about Germany's commitment to opposing Russia's aggression.
Russian President Vladimir Putin said that approving the pipeline could help shave down high European energy prices and help even out the markets.
The natural gas pipeline, critics argue, would allow Moscow to hold Europe hostage and isolate Ukraine.
The Russian president had an immediate impact on sky high gas prices when he said his country would increase supply.
The senator claimed without evidence that Ukraine meddled in the 2016 presidential election.
Just ten years ago, steps towards cleaner energy could have been easily dismissed as greenwashing – polluters' corporate PR. Not today: Key Russian exporters are keen to make themselves indispensable for Europe's green future.
Russia pledged not to leave Europe in the cold, but only for now.
The man reportedly wrote a letter to Vladimir Putin, before setting himself on fire in front of his local city council.
A spokesman for Nord Stream 2 said more than 200 non-Russian companies are building the pipeline and many contracts already have been concluded.
The sanctions bill is a signature away from becoming law.
As Russia and Turkey increasingly cooperate in Syria, a lucrative natural gas pipeline deal progresses.
Russian state-run Gazprom voiced concern over its controversial European pipeline plans.
Page is the only U.S. national the FBI is monitoring as part of its investigation into Russia election interference.
The stage is set for the U.S. to change the balance of EU-Russian energy transactions.
After 40 years on stage, Paata Burchuladze is running to be Georgia's next prime minister.
"When it comes to Russian gas, united we stand, divided we fall," Amber Rudd will say on Thursday.
At least 15 other countries are prepared to back the freeze, says Russia's energy minister.
Moscow uses Gazprom to impose its foreign policy agenda on European countries.