OAKLAND, Calif. -- The Oakland Athletics said a team employee has been suspended after it was discovered that he hid a camera inside the weight room at the O.co Coliseum.

Strength and conditioning coach Mike Henriques was sent home when the A's were on a recent road trip.

Henriques said he set up the camera to watch players working out and rehabilitating from injuries. He is in his fifth year with the team.

The A's said Friday there was an ongoing investigation after strength and conditioning coach Mike Henriques was sent home when they were on a recent road trip. Michael Zagaris/Oakland Athletics/Getty Images

The A's said Friday there was an ongoing investigation. Yahoo! Sports first reported the story and said an independent law firm is handling the investigation.

"It's an internal personnel issue," A's director of corporate operations Catherine Aker told reporters before Friday's game between Oakland and the Chicago Cubs. "We take it very seriously."

The camera was discovered by a player on July 25, one day after the A's left on a nine-game trip.

A's player rep Sean Doolittle did not accompany the team on its trip because he was on the disabled list because of a strained left shoulder. Doolittle was notified of the situation and took the issue to management.