US marines have tested a new robotic mule at the world's largest international maritime warfare exercise in Hawaii.

The Legged Squad Support System (LS3) is operated by a sensor strapped to a human foot.

Military footage shows Lance Corporal Brandon Dieckmann fitting the sensor to his boot, before LS3 follows him across a field.

The Rim of the Pacific (RIMPAC) exercise takes place every year at the Kahuku Training Area in Oahu.