Some of the world's leading robotics and artificial intelligence pioneers are calling on the United Nations to ban the development and use of killer robots. Tesla's Elon Musk and Alphabet's Mustafa Suleyman are leading a group of 116 specialists from across 26 countries who are calling for the ban on autonomous weapons. The UN recently voted to begin formal discussions on such weapons which include drones, tanks and automated machine guns. Ahead of this, the group of founders of AI and robotics companies have sent an open letter to the UN calling for it to prevent the arms race that is currently under way for killer robots. In their letter, the founders warn the review conference ... that this arms race threatens to usher in the third revolution in warfare" after gunpowder and nuclear arms. The founders wrote: "Once developed, lethal autonomous weapons will permit armed conflict to be fought at a scale greater than ever, and at timescales faster than humans can comprehend." The founders call for "morally wrong" lethal autonomous weapons systems to be added to the list of weapons banned under the UN's convention on certain conventional weapons (CCW) brought into force in 1983, which includes chemical and intentionally blinding laser weapons. Musk ... has repeatedly warned for the need for pro-active regulation of AI, calling it humanity's biggest existential threat. While the suggestion of killer robots conjures images from science fiction ... lethal autonomous weapons are already in use.