Runner says she saw 'many with hypothermia' during deadly China ultramarathon – video

Twenty-one runners died on Saturday when freezing temperatures, hail and high winds hit the racing route: a 62-mile (100km) stretch of mountainous trail about 3,000 metres above sea level in the Yellow River Stone Forest tourist site near Baiyin city, north-west China. Mountaineer Luo Jing comments on the conditions during the race.

Family members and fellow competitors of those how died are seeking answers and accountability, as further accounts emerge of survivors' harrowing experiences

• Survivors and bereaved seek answers after 21 deaths in China ultramarathon