An eight-year-old and a four-year-old were among four injured at Joe Pool Lake Sunday night when the tube they were riding on was struck by another boat.
The collision occurred around 8:40 p.m. and sent both children to the hospital.
The eight-year-old was taken by air ambulance to Children's Medical Center in Dallas in critical condition.
The four-year-old was taken to Children's by ground ambulance and is in stable condition.
Two other children who were on the tube were treated and released at the scene with minor injuries. All of the kids were wearing life jackets.
Grand Prairie Police Public Information Officer Lyle Gensler said the investigation into the crash in ongoing, but the parties involved have been identified.