-- An Iowa high school football coach died Wednesday after he was shot inside the school as athletes were lifting weights, the district superintendent told CNN.

Ed Thomas had been with the school district for more than 30 years and was well-known in the region.

1 of 2 Ed Thomas died shortly after he arrived at Covenant Medical Center in Waterloo, Iowa, according to a hospital statement.

He was flown to a hospital after he was shot about 8:30 a.m.at Aplington-Parkersburg High School, said Holly Fokkena, Butler County auditor.

No students were injured, although about 50 students were present at the time of the shooting, she said.

One person, an adult, was taken into custody, Fokkena said.

Superintendent Jon Thompson of the Aplington-Parkersburg Community Schools said crisis counselors were on scene to assist students who witnessed the shooting.

Thompson declined to provide more details on the shooting, saying they were not clear.

Thomas had been with the school district for more than 30 years, Thompson said, and was a well-known football coach in the region.