North Korea says Warmbier's death a 'mystery to us as well'

North Korea said on Friday the death of U.S. university student Otto Warmbier soon after his return home was a mystery and dismissed accusations that he had died because of torture and beating during his captivity as "groundless."
Read more: http://www.reuters.com/article/us-usa-northkorea-idUSKBN19E0VY?source=Snapzu