One of the sets that Madonna uses on her "Stick & Sweet" tour collapsed Thursday in France. One person was killed and six were injured. Police are still trying to rescue others who are trapped in the rubble.

The accident occurred at 5:15pm local time (11:15am EST) at Nice's Stade Velodrome during preparations for the Material Girl's next show. The stadium is being shut down by police and fire officials while they attempt to rescue those who are still trapped.

Madonna's concert planned for Sunday, July 19, has also been canceled.

Few details are known at this time. Stay tuned for the latest.