Survivors of the Nazi concentration camp of Bergen-Belsen, where 70,000 people died, gathered on Friday for a low-key ceremony to mark their liberation by British troops 60 years ago to the day. The camp near Hanover in northern Germany was the first to be liberated by British troops on April 15, 1945, just weeks before Nazi Germany surrendered. Officials from the state of Lower Saxony were to visit the site of the camp to talk with a group of young people from nine countries who have been meeting there for the past week. The children from Germany, Israel, Lithuania, the Netherlands, Poland, Russia, Slovakia, Belarus and Norway will meet survivors, a statement from the regional authorities said. The children have been trying to piece together evidence about the lives of the camp inmates, who numbered 70,000 by 1945. An official ceremony will take place on Sunday.