France\'s double Olympic gold medallist Yannick Agnel set a new world record in the short course 400m freestyle event at the French championships on Thursday. Agnel timed 3min 32.25sec, beating the previous mark of 3:32.77 set by German Paul Biedermann in Berlin in November 2009. The 20-year-old Agnel claimed a surprise double gold in the men\'s 200m freestyle and the 4x100m relay with the French team in his first Olympics in London this summer. He also won a silver as part of the 4x200m relay team. \"I was targeting a time close to the world record,\" Agnel said. \"Now, I haven\'t fixed my limits. \"Up until the end of the week, I\'ve got the 100, 200 and 800m.\" Agnel is set to compete in the European short-course championships in the French city of Chartres between November 22-25 after wrapping up his events in the western city of Angers.