An Irving woman died Sunday after falling at a climbing gym in Grapevine.

The Dallas County medical examiner identified the victim as Susan Mailloux.

Grapevine police Sgt. Robert Eberling said police and fire personnel were called to the Summit Climbing Gym on Mustang Drive at about 5 p.m. to help an injured customer.

Emergency responders found Mailloux, who had apparently fallen from a height of 25 to 30 feet.

Eberling said the injured woman was airlifted to Parkland Memorial Hospital in Dallas, where she was pronounced dead upon arrival.

On Monday, Grapevine police said Mailloux, an experienced climber, was climbing unsupervised on Sunday. Police said it appeared Mailloux failed to attach to an auto belay system installed at the gym.

Police are continuing their investigation into the fatal fall.

"We are heartbroken for this tragic accident," said Kyle Clinkscales, Summit Climbing Gym owner. "Our hearts go out to her and her family."

Mailloux worked for Time Warner Cable, which released a statement about her death on Monday.

"We were saddened to hear about the passing of our co-worker Susan Mailloux," the company said in a statement. "Susan was a 14-year veteran at Time Warner Cable and will be remembered for her warm sense of humor and her commitment to providing outstanding service to our customers. We will keep her family in our thoughts and prayers."

NBC 5's Julie Fine contributed to this report.