KNOXVILLE – A skydiving accident in Knoxville on Friday resulted in a man being airlifted to a Des Moines hospital, and authorities have now released additional information on the incident.

According to the Marion County Sheriff’s Office, 61-year-old Samuel Owens of Urbandale was part of a group of skydivers who jumped from just under 15,000 feet on Friday afternoon around 2:30pm. At around 4,000 feet, members of the group noticed Owens was experiencing an issue with his parachute, and he spiraled out of control and hit the ground near the Knoxville airport.

As of Friday, Owens was in critical condition. The precise extent of his injuries has not been released at this time.