Another vessel surfaced and saw that a small boat was moving at high…

Another vessel surfaced and saw that a small boat was moving at high speed from Ladoga towards the city.

Consensus

The incident occurred in the Petrokrepost Bay of Lake Ladoga, Leningrad Oblast.
The victim was a 57-year-old man engaged in underwater fishing.
The man was fatally injured by the propeller of a motorboat.
The event took place on the night of August 1.
The man's head was severed, and it was recovered by his friend.
Search operations for the body were conducted by authorities and volunteers.
The victim's friend reported that the boat approached at high speed and that the man did not survive the impact.

The man sustained injuries incompatible with life, and investigators are examining the scene and searching for the vessel and its operator. — vesti
The victim's friend, Dmitry, described the incident in detail, including the presence of two divers, the use of a flashlight to signal danger, and the discovery of the victim's severed head and a hand found later in the Neva River near Sverdlovsk. — fontanka
The victim's body has not been found to date, and search efforts included regional rescuers and volunteers from the 'LizaAlert' water search unit. — fontanka