12 injured in Dallas Cowboys practice collapse Arena

(CNN) - An air roof over Dallas Cowboys' practice field collapsed during a severe storm Saturday afternoon, and 12 wounded, authorities said.

About 70 people, including more than two dozen junior team, where the plant does blown before 3:30 hours (4h30 hours ET), team officials said.

Two or three were seriously injured, but nobody believes in life-threatening condition Saturday night, said Dr. Paul Pepe, Dallas County Chapter of emergency services, a medical emergency.

CNN reports WFAA Affiliation Cowboys teams coach Joe DeCamillis, son of former NFL Head Coach Dan Reeves, a broken back. DeCamillis to wear a neck stretcher judge.

A line of severe thunderstorms were passing through the territory of Dallas, at the time, he said, but no other damage was to buildings, said Mike Adams, a dispatcher of Irving, Texas, fire.

Arnold Payne, a photographer for WFAA was once again the Cowboys' training, when the rain falls "extremely difficult".

"I noticed that the walls began to shake ... and then I noticed that the lights were hung from the ceiling began to govern, and not stop," said Payne CNN. Shortly thereafter, he said, "It was as if someone with a PIN key and press a ball. "

Payne said the staff photographers were Cowboys-metal frame under the canopy of the film and training "on the horse, in reality, the building of the storm." At least in surgery Saturday evening, he said.

"There was nothing to do, for them, and happened so quickly - but only if accompanied, as it imploded," said Payne.

Video from CNN affiliate WFAA showed caving the roof during a violent storm, sending players, coaches, and a handful of journalists and photographers Scrambling to escape.

Cowboys' owner Jerry Jones said NBC, nearly 27 students of the NFL teams and team members to coach employees in Building S-Dallas at this time.

"They are not a warning, and the structure collapsed," said Jones, speaking from Kentucky Derby Louisville. "We are the evaluation of the violation on that date."