French police detained a man on suspicion of terrorism a day before the opening of the Olympic Games in Paris, the national anti-terrorism prosecutor’s office said on Thursday. The 18-year-old had been in contact with another man who had already been taken into custody on Tuesday. The two are suspected of having prepared “violent acts,” the office said. They were planning an attack during the Olympic Games, according to local media reports, though the public prosecutor’s office did not comment on these. They are still investigating how far advanced the plans were, they said. The Olympic Games …