The air-supported dome on the Dallas Cowboys practice facility collapsed this afternoon. Several people were trapped and four have been sent to the hospital. Players and coaches are reportedly safe. [DMN, MartyBTV]
Update: The Dallas Morning News is now reporting that special teams coach Joe DeCamillis was sent to the hospital with a neck injury.
Update II: Here's a local news report from KTVT in Dallas via Pacman Jonesin.