"Officers of the Criminal Investigation Department of the Ministry of Internal Affairs of Russia in the Kostroma region detained two suspects who confessed to the murder of the child," the message says.
The body of the deceased was found in a room of one of the hostels in Kostroma.
According to the investigation, on January 4, the girl went for a walk, after which she was taken by two unknown persons and disappeared in an unknown direction.
On December 29, investigators organized an investigation into the death of an 11-year-old boy in the city of Dubna, Moscow Region.