A record 60 people have been charged with terrorism offenses in the United States this year, according to new figures released by the Justice Department. Three of those were charged last week. Those arrested come from a young demographic. Over 55% of those arrested were under 25 and roughly 1/3 below 21, The Washington Post reported. In Europe, authorities in Belgium arrested two people for allegedly planning an attack during New Year's Eve celebrations in central Brussels. "Our investigation revealed serious threats of an attack on symbolic places in Brussels during the celebrations for New Year's Eve," prosecutors said on Tuesday. Police found military clothing and Islamic State propaganda, but no weapons. This plot is not thought to be related to the Paris attacks. Europe is on high alert as intelligence agencies prepare for possible terrorist attacks leading up to New Year's Eve. "In the days before Christmas a warning was sent out by a friendly (intelligence) service to numerous European capitals, saying that it could come to an attack involving explosives or a shooting between Christmas and the New Year in crowded spaces," Austrian police said in a statement.