Google said it has been secretly developing autonomous flying vehicles for over two years.

These drones, built under the Project Wing program, were developed to deliver disaster relief and commerce.

Project Wing was created in Google X, the company's "secret" facility where technologies such as self-driving cars and Google Glass were also developed.

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"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," said Google in a statement.

Able to fly at 40 to 60 meters above ground, the unmanned drones will follow a pre-programmed route.

A primary goal set for the drones is for it to fly small items like medicine to isolated, disaster-afflicted areas. An initial thought was the delivery of defibrillators to heart attack victims.

This could mean a great deal, especially if the drones can continuously and efficiently service a large group of people who can't be physically reached by rescuers during an emergency.

Google said prototypes have already been built and are currently being tested in remote farms in Queensland, Australia. Australia was chosen because of its leniency towards drone use.

Farmers participating in the project have been able to receive dog treats, cattle vaccines, candy bars, water, and radios using the drones.

Google eventually hopes to use the drone technology to deliver retail items to its customers in an effort to further expand its Google Shopping Express service.

Google said, however, that Project Wing is still in its initial stages and might take years before it's made available to the public.

In 2015, Google plans to focus on the technology's safety systems, and to find ways to teach the drones to handle mechanical issues and, to navigate around each other.

"We have to fly efficient delivery routes that respect constraints such as noise, privacy, and safety of those on the ground, and we have to be good enough to deliver to an exact spot the size of a doorstop," the company spokesperson said.