Repair work has been completed on three high-speed train lines in France which were hit by arson attacks before the official opening of the Olympic Games. Trains are running again on the lines without delays, the state railway operator SNCF announced. On the route between Paris and the south-west of France, practically all the scheduled trains were said to be running again. On the route to the north, which is used by trains travelling between Cologne and Paris, three out of four scheduled trains were running, with no delays. The eastbound line from Paris towards Strasbourg, Stuttgart and Frank…