According to Sport24.ru, the 15 year old was goaltender and his team were playing in the championship game when the goaltender would take a skate to the neck that cut him open and was bleeding in his crease.
The report states the boy is now awake and in stable condition, although medical professionals continue to monitor him closely in an intensive care unit. As you can see in the video below, the goalie was eventually removed from the ice on a stretcher after a couple of minutes of being on the ice. You can see the pool of blood left behind when he is finally moved.