Dallas (AP) - The Texas Board of Professional Engineers is investigating the collapse of the Dallas Cowboys' indoor practice facility, the agency's spokesman said Friday.

Lance Kinney said the board has opened several lines of inquiry related to the failure of the membrane-style building, which fell Saturday during heavy winds and injured 12 people, but declined to discuss details. The board typically deals with whether an engineer is licensed and qualified, and whether the plans are up to code, Kinney said.

The Dallas Morning News, which first reported the investigation in Friday's editions, said the probe includes issues related to the City of Irving's oversight of the project, which was initiated in 2003.

Records released by the city on Monday did not include the name of the engineer who signed off on the design, nor did they include the building's specifications or blueprints. The documents should have been retained for the life of the building, the newspaper reported.

A spokeswoman for the city declined comment Friday.