The program, dubbed Project Wing, has been housed under Google X, the company's secretive facility where it created other projects like Google Glass and its self-driving cars.
"Self-flying vehicles could open up entirely new approaches to moving goods -- including options that are cheaper, faster, less wasteful and more environmentally sensitive than what's possible today," the company says in a document describing the effort.
The drones are designed to follow a pre-programmed route at the push of a button, flying at 40 to 60 meters above the ground.
