Online retailer Amazon is testing unmanned drones called Octocopters in a bid to deliver packages to customers within 30 minutes.
The drones could deliver packages that weigh up to 2.3kg but the service is not expected to start for at least five years, the company's chief executive Jeff Bezos claimed.
Mr Bezos told CBS television's 60 Minutes programme: "These are effectively drones but there’s no reason that they can’t be used as delivery vehicles...I know this looks like science fiction. It’s not."
"We can carry objects, we think, up to five pounds, which covers 86 per cent of the items that we deliver...These are electric motors, so this is all electric; it’s very green, it’s better than driving trucks around," he added.
The service will be called Prime Air but US aviation officials have not approved use of the drones.