French railway officials said progress has been made on repairing the high-speed rail network on Friday, hours after arson attacks disrupted service just ahead of the opening ceremony for the Paris Olympic Games. Every third scheduled train on the high-speed line from Paris to the south-west can now run again, the state railroad SNCF announced on Friday afternoon. However, travellers still have to prepare for delays of between one and a half and two hours. On the high-speed line to the north, which is also used by trains from Cologne, London and Brussels, there are still isolated cancellations…