A U.S. service member fell to his death on Saturday at the University of Texas-San Antonio and Navy football game during a fast rope demonstration preceding kickoff.

Video of the incident showed the service member, who has only been identified as a member of the Air Force’s Sixth Combat Training Squadron, Detachment 2, descending uncontrollably from the rafters of the Alamodome in San Antonio, Texas before impacting the field below.

Air Force officials confirmed that the service member died at a local hospital as a result of the injuries sustained from the fall.

“We are deeply saddened by the incident that occurred at the start of tonight’s football game,” the university said in a statement following the incident. “Our heartfelt thoughts and prayers are with the soldier who was affected, his family and his military colleagues.”

What caused the accident is not immediately known.