PARIS (AP) — The French national rail company SNCF says high-speed lines have been hit by several “malicious acts” that have heavily disrupted traffic on the day of the high-risk Olympics opening ceremony. Lines in the west, north and east of France were affected, SNCF announced. Government officials denounced the incidents hours before the opening ceremony of the Paris Olympics, which are happening around France, though there was no immediate sign of a link to the Games. Many French families are also heading on summer vacation Friday. National police said authorities are investigating what happened. French media reported a big fire on a busy western route.