"The international caving expedition Yana-2012 found the remains of the legendary mammoth living cells in the northeastern Russian republic of Yakutia, reported the television from the capital."
This article says cavers found the remains: http://www.plenglish.com/index.php?option=com_content&task=view&id=543554&Itemid=1
This article does not mention cavers: http://www.dailymail.co.uk/sciencetech/article-2201589/Perfectly-preserved-living-woolly-mammoth-cells-Siberia-raises-hopes-extinct-animal-cloned.html