Posted by ESPN.com's Matt Mosley
An air-supported practice bubble at the Cowboys' Valley Ranch headquarters collapsed this afternoon while players and coaches were conducting a rookie minicamp. A Cowboys spokesman has told The Dallas Morning News that four members of the club's support staff have been transported to a local hospital, but no serious injuries have been reported. The local CBS affiliate (KTVT 11) had talked to assistant coach Brett Maxie, who had a gash in his leg that he apparently suffered during the roof collapse.
I had attended the morning practice session and the open locker room period, but didn't stick around for the second practice. A severe thunderstorm hit the area about an hour ago, and that's apparently what caused the collapse. I'm on my way to Valley Ranch as we speak and will try to provide more details as they emerge. Here's the latest report from the scene via the Morning News' blog.