A 24-year-old former high school football player walked into the school’s weight room Wednesday morning and fatally shot his former coach, before sheriff’s deputies arrested him at a nearby home a short time later, authorities said.

Mark Becker shot Aplington-Parkersburg High School coach Ed Thomas at about 8 a.m. with about 50 students in the school, including several in the weight room at the time. School was not in session, and no one else was injured in the attack.

Becker is charged with first-degree murder and was being held in Butler County jail.

Thomas, the 2005 NFL high school football coach of the year, was airlifted to a hospital and died, his family said in a statement. He was 58.

Holly Fokkena, a spokeswoman for Butler County, said an adult male suspect has been taken into custody and was at the Butler County jail. She did not say if the gunman was a student at the school. But school district board secretary Sue Miller said she had heard he was not.

The district’s superintendent and a guidance counselor were meeting with students who were in the weight room at the time of the shooting.

“No kids were hurt, we’re thankful for that,” Superintendent Jon Thompson told KOEL radio. “They did witness this and so we have counselors at the site to talk with the kids.”

The school is in Parkersburg, about 80 miles northeast of Des Moines.

Thomas compiled a career record of 292-84 in 37 seasons as a head coach, 34 of them at Aplington-Parkersburg, and was one of the most well-known high school football coaches in Iowa. He was honored as the NFL High School Coach of the Year in 2005, and four of his former players are in the NFL: Green Bay’s Aaron Kampman, Jacksonville’s Brad Meester, Detroit’s Jared DeVries and Denver’s Casey Wiegmann.

DeVries, a defensive end with the Lions, walked off the practice field in Allen Park, Mich., toward the end of its morning practice, apparently shaken.

Team officials said DeVries was not immediately available for comment.

Thomas made national headlines last year when he insisted that the high school’s football field, named in his honor, be rebuilt as a way to help restore community pride in Parkersburg after it was hit by a powerful tornado in May 2008 that killed six people and destroyed the high school.

“A lot of people know coach Thomas for his success as a football coach, but a lot of people here locally know him as a person, as a dad and grandfather, and that’s where our thoughts are right now, with coach Thomas,” said Superintendent Thompson.

Gov. Chet Culver, who was once a high school teacher and coach in Des Moines, said he was stunned by the shooting.

“As a former high school football coach, I’ve always had great admiration and respect for Coach Thomas,” Culver said in a statement. “The state and national coaching fraternity has suffered a devastating loss. As we mourn the passing of Coach Thomas, it is my hope we can all continue to learn from his example.”