US `to ban citizens from travelling to North Korea`
North Korea has said through its state media that Warmbier`s death was "a mystery" and dismissed accusations that he had died as a result of torture and beating in captivity.
Jul 21, 2017, 18:34 PM ISTNorth Korea tour firms mull ban on Americans after Otto Warmbier death
North Korea claimed Otto Warmbier fell into a coma soon after he was sentenced last year.