A Fourth of July celebration on Lake Lanier turned tragic when a boat exploded, injuring seven people, including a child.

The explosion occurred at around 7 p.m. just off Lanier Islands Parkway, near Margaritaville, according to Hall County Fire Rescue and the Georgia Department of Natural Resources. The boat involved was a 23-foot cabin cruiser that was being towed at the time. The cause of the explosion remains under investigation.

Fortunately, a Hall County Marine Unit was nearby and witnessed the explosion and immediately responded.

“The operator towing the boat rescued all seven individuals and brought them to waiting paramedics at Margaritaville,” the DNR said in a statement.

Five victims including a child with serious injuries, were transported to local hospitals. The child was airlifted to receive immediate care. The other two victims were treated at the scene.

Hall County Fire Rescue spokesperson Kimberlie Ledsinger said, “Upon arrival, the rescue boat crew discovered a vessel engulfed in flames and five patients needing immediate care.”

Officials said all victims were in stable condition as they left the scene. The injured ranged in age from 5 to 45 and they suffered second- and third-degree burns.