At least 84 people were killed in a shooting attack Friday on a youth camp near Oslo, police said Saturday. Oslo deputy police chief Roger Andresen said it was defined as a terror attack, adding that it could be punishable with a maximum of 21-year prison term. Prime Minister Jens Stoltenberg said it was "a national tragedy" and the worst act of violence in Norway since World War II, according to a report of the German Press Agency "DPA".