Cowboys special teams coach Joe DeCamillis broke his back and 11 more were injured when winds ripped through the roof of the team's indoor practice facility during a rookie minicamp today.

Former coach Dan Reeves, DeCamillis' father-in-law, said has a couple of broken vertebrae in his lower back but is lucky not to be paralyzed.

The storm hit while 27 players were going through workouts. Officials say there were about 70 people in the facility.

Of the 12 hospitalized, 10 were taken by emergency vehicles and two went on their own. Witnesses said lights started flickering and shaking minutes before the collapse, prompting players, coaches, staff members and reporters to vacate the building.

The storm produced winds measured at 64 mph just before it struck the Cowboys facility.