TRAVIS COUNTY, Texas (KXAN) — The Travis County Sheriff’s Office is investigating the third death on Lake Travis this year, it said Monday.

TCSO responded to a call July 4 at 7:45 p.m. at Mansfield Dam Park for a person that was rescued from Lake Travis by family and bystanders. The sheriff’s office said CPR was given, and STAR Flight took the person to a hospital. The person was pronounced dead July 6, TCSO said.

The sheriff’s office is investigating the death, which it said is customary for unnatural deaths on Lake Travis. Deputies did not share what may have caused this person’s death.

“TCSO reminds patrons of Lake Travis that the best way to ensure your safety on the lake, or any other body of water, is to wear a life jacket,” the release said.