Scary news from Tour de France winner Chris Froome -- the cyclist was involved in a violent crash during a training session ... sustaining serious injuries, including broken ribs and a fractured back.
The incident occurred on Wednesday when Froome -- a two-time Olympic medalist -- was working out solo in a small French city.
"Chris was airlifted to a hospital in Toulon yesterday afternoon following a serious training crash," his team said in a statement on Thursday.