It reportedly destroys 15 % of all documents at one of Russia 's largest public libraries . Head of Russian Academy of Sciences compares loss to a nuclear disaster . Investigators are looking into whether a short circuit is to blame for blaze , he says .
Fire reportedly destroys 15 % of all documents at one of Russia 's largest public libraries . Head of Russian Academy of Sciences compares loss to Chernobyl nuclear disaster . Investigators are looking into whether a short circuit is to blame for blaze , ministry says .