As many as 800,000 people have been affected by train cancellations due to the attack on the high-speed rail network, French railway company SNCF said on Friday. SNCF said that the impact would be noticeable throughout the weekend. Transport Minister Patrice Vergriete announced that every second train to the east and north and every fourth high-speed train in the direction of Bordeaux is affected. Security measures are being intensified, Paris Police Prefect Laurent Nuñez said on the website of broadcaster FranceInfo, with his force “concentrating its personnel on the Paris stations.” A few ho…