Stewart broke both the tibia and fibula in his right leg, although the severity of the breaks weren't mentioned. According to a report from NASCAR, which cites The Des Moines Register, Stewart was alert and talking when he was pulled from the car, but was rushed into surgery on arrival at a local hospital. The report doesn't mention any additional injuries to the other three drivers involved.
Stewart was in the lead of the Front Row Challenge on Monday night, a winged sprint car race, taking place about an hour east of Des Moines. A backmarker lost control and ended up tangling with the three front runners near the end of the race. The incident has a healthy dose of irony following comments Stewart made to NASCAR after last week's crash, "You guys (in the media) need to watch more sprint car videos and stuff. It's starting to get annoying this week about that. That was just an average sprint car wreck. When they wreck, they get upside down like that. That was not a big deal." This one was apparently a much bigger deal.
With a broken right leg, Stewart won't be racing at this weekend's Sprint Cup race at Watkins Glen. It's unclear who Stewart-Haas Racing will field as a replacement and how long the three-time champion will be out.