Over one thousand bone fragments, plus a rusty, unidentified make of gun, were uncovered on October 4 by archaeologists in a room under the floor of a basement of a house in the central Nikolskaya Street.
The medical examination revealed that the remains belonged to 72 men and women, including nine children. Some of the bones were also determined to be animal remains.
"The causes of death have not been confirmed, and they are impossible to identify," Sergei Buluchevsky, head of the investigative department, said.
Buluchevsky added that no signs of violent death had been found, and that no criminal case would be opened.
A Moscow law-enforcement source had earlier said that a preliminary examination of the remains had identified gunshot-like wounds. Further investigations failed to confirm this, however.
"The theory that the remains belong to victims of 1930s [Stalin-era] repression has not been confirmed," Sergei Buluchevsky commented.
