Authorities say that a San Luis Obispo Triathlon swimmer was saved using CPR and an automated external defibrillator at the Sinsheimer Pool in San Luis Obispo on Sunday.

Lifeguards had removed the swimmer from the pool after becoming unconscious during the event, according to a San Luis Obispo Fire Department news release. Authorities would not disclose the swimmer’s name or any other information about the triathlete.

Lifeguards, medical professionals who happened to be at the event and the swimmer’s family did CPR because the triathlete wasn’t breathing had no pulse, according to the news release.

Liefguards also used the pool’s on-site defibrillator on the swimmer.

After what the Fire Department described as advanced life-support measures, the swimmer started breathing again and regained a pulse, officials said.

The swimmer was being treated at French Hospital Medical Center in San Luis Obispo. No information was available on the triathlete’s condition.