A 14-year-old Roxby Downs boy has died after a jet ski collided with two swimmers on the Murray River, Jetski rider charged

A man has been charged with causing death by dangerous driving after a young teenager who was swimming in the Murray River died in a collision with a jetski.

A jetski rider has been charged after a boy, 14, was struck and killed by a jetski while swimming in the Murray River.

Two children were swimming near Echidnea Ave at Murkbo, near Blanchetown, about 2.20pm Thursday when they were hit.

One of the boys from Roxby Downs was pulled from the water unconscious and died at the scene.

The other child who was younger suffered minor injuries and was taken to hospital as a precaution.

The Murray River at Murbko. Picture: File

The rider of the jetski, a Craigmore man, 43, was charged with aggravated causing death by dangerous driving, and aggravated causing harm by dangerous driving,

Police detectives and marine safety officers from the Water Operations Unit are still investigating the incident.

Anyone who witnessed the incident is asked to contact Crime Stoppers on 1800 333 000.