At least five Russian businessmen have died by apparent suicide in just three months

 At least five prominent Russian businessmen have reportedly died by suicide since late January, with three of them allegedly killing members of their families before taking their own lives.

Four of the dead men were associated with the Russian state-owned energy giant Gazprom or one of its subsidiaries.

CNN's calls to Gazprom have not been returned.

A top executive at Gazprom was found dead in his cottage in the village of Leninsky near Leningrad on January 30, 2022, according to Russian state media RIA Novosti.

RIA reported that a suicide note was found at the scene and that the investigators were investigating the death as a suicide. Russian national broadcaster RenTv has identified the man as Leonid Shulman, the head of transport at Gazprom Invest.

Just a month after that, another top executive at Gazprom was found dead in the same village. Alexander Tyulakov was found dead in his garage on February 25, according to Novaya Gazeta, an independent Russian newspaper. Novaya Gazeta reported he died by suicide.