"The discovery of four graves from the 11th century site Yur-Yakha III are unlike anything else seen from this era in Yamal, say scientists. Two of the dead were young women aged around 18 to 20 and all had 'serious diseases'." Source: Archaeology News Network.
"The burials were in a crouched position and there are suggestions that rituals, perhaps even sacrifices, were involved in the deaths of these nomads with significant health problems."
Note: "More excavations will be carried out here to see if further answers can be found," according to Ancient Origins. "Three women and one man were buried in the medieval graves." This article, a reprint from the Siberian Times, contains a detailed description of the injuries and many photographs of the site.