A criminal case has been launched following the grisly discovery of two skeletons at a construction site in Yekaterinburg, the regional branch of the Investigative Committee said in a statement Thursday.
The remains were discovered Monday evening by teenagers who were mountain-biking at the construction site of a future sporting facility in a wooded area of the city, according to investigators.
According to a preliminary probe, the remains may have been underground for between five and 20 years. Investigators have yet to determine the sex, age and cause of death.
An impending forensic examination is expected to provide law enforcement officers with more information about the circumstances surrounding the individuals' deaths and their burial, the Investigative Committee said.