Mara Flávia died during Ironman

In a later update, the Montgomery County Sheriff’s Office provided additional details, stating: “The Montgomery County Sheriff’s Office can confirm that a participant in today’s Ironman Triathlon in the Woodlands has drowned while participating in the swim portion of the event.

“The Woodlands Fire Department completed the rescue in Lake Woodlands near North Shore Park. Once it was determined the participant was deceased, The Montgomery County Sheriff’s Office began their investigation into this drowning per normal protocols.”

It was later confirmed that the deceased participant was Mara Flávia, according to UNILAD.

The 38-year-old fitness influencer had more than 60,000 followers on Instagram. According to PEOPLE, the incident occurred shortly after the swim portion began, when she disappeared underwater. Lifeguards and fellow competitors reportedly attempted to rescue her but were unsuccessful. A dive team later recovered her body from Lake Woodlands.