It’s been a mystery why a Russian gas magnate and his family died in their Spanish estate.

Investigators are seeking to figure out whether the incident was a domestic murder-suicide or an orchestrated assault, according to reports.

Sergey Protosenya and his wife Natalia
Sergey Protosenya and his wife Natalia

Their bodies were discovered a day after another Gazprom executive was discovered dead in similar circumstances with his own family in Moscow.

Meet Sergey Protosenya Wife Natalya

The bodies of Sergey Protosenya, his wife, and their little daughter Maria were allegedly discovered at their residence in the seaside resort of Lloret de Mar in Catalonia around 4 p.m. on Tuesday, April 19.

Sergey is suspected of being the perpetrator of a homicide.

Sergey Protosenya Wife Natalya Wiki

Sergey Protosenya’s wife, Natalya has not yet been profiled by

Sergey Protosenya Wife Natalya Age

Sergey Protosenya’s wife, Natalya died at the age of 55.

Sergey Protosenya Wife Natalya Cause of Death

According to Mirror, Protosenya killed his wife Natalya and daughter with a hatchet in their opulent Spanish mansion before committing suicide.

Protosenya is also believed to have murdered his wife Natalia and his 18-year-old daughter Maria before killing himself on the patio of his estate in Lloret de Mar on Spain’s Costa Brava, according to other local media.