Lindsey Vonn competes during the women's Super-G event of the Ski World Championships in Schladming, Austria on February 5, 2013. Credit: Fabrice Coffrini/AFP/Getty

Lindsey Vonn was airlifted to a hospital on Tuesday, Feb. 5, after she crashed during the super-G (super giant slalom) at opening day of the Alpine Ski World Championships in Austria. According to reports, the 28-year-old Olympic gold-medalist injured her right knee in the accident.

Vonn, a four-time overall World Cup champion, apparently lost her balance while landing after a jump. Her right ski came off immediately, and she slid off course and into a gate.

Medical personnel tended to her injuries for 12 minutes before she was taken by helicopter to a hospital. During this time, the race -- which had already been postponed for more than three hours because of fog -- was temporarily delayed. It resumed after 15 minutes. No other information on Vonn's condition was immediately available from her U.S. team.

ESPN reports that several skiers struggled with the conditions on Tuesday. "It's not a very difficult course, but in some parts you couldn't see anything," Swiss racer Fabienne Suter told the site.