Newsweek reported that an oil tycoon was found dead over the weekend at the house of a shaman.

The news agency said that he was found in a shaman's home in Mytishchi, and authorities are investigating.

The Moscow Times is an independent Russian news site.

A source told the Russian outlet that he was highly intoxicated when he showed up at the house, and that he suffered from a heart attack.

Newsweek reported that the telegram channel Mash said that he was there to get a toad venom cure for a sore throat, having been friendly with the shaman and his wife for some time.

Newsweek and others have reported that Alexander Subbotin used to be high up.

The second-largest oil producer in the country is Lukoil. The company has over 100,000 employees according to its website.

According to SuperYachtFan, Subbotin's brother is worth an estimated $100 million and owns a yacht.

Subbotin is one of several Russian business people and members of their families who have died in strange circumstances in the last few months.

Insider has reported that at least six of them were linked to large Russian energy companies.

In all cases, there are suspicions that the deaths may have been staged as suicides, but who did this and why?

Protosenya's wife and daughter were also found dead.

Fedor, his son, told MailOnline that he does not believe the police theory that it was a murder-suicide.

A request for comment was not immediately responded to.