SlaughterBots.

What do you think of when you see the word SlaughterBot?
Maybe you think of a giant killer robot that can destroy the whole mankind in a matter of seconds. Well you're right but it's not a giant killer robot but it's a small drone that can fit in your palm but has just enough capacity to kill a human.

Thankfully this isn't real

YET!!!!

A short film was shown at the UN Convention on Certain Conventional Weapons. Starting a campaign against production of Killer robots. The video was released by Stuart J. Russell. A Professor at University of California, Berkeley.
The reason of showing this video was to make UN pass a legislation to prohibit the production of such type of technology. In the video it shows that it can wipe out the whole population of a city. So yeah that is something life threatening(pun intended).

Video link

How does it work?

Being a drone you'll think that someone will fly this thing. No, that's not the case. An AI flies this, with having a processor that can react 100 times faster than a human. It's stochastic motion makes it hard for snipers to take it out. Having wide field cameras, sensors. It also has facial recognition in it so it can find and kill its target easily.
Inside it, it has three gram shaped explosive just enough to penetrate your skull and blow up your brain.

We have to act fast

In the end of the video Stuart says that, "We have an opportunity to prevent the future you just saw, but the window to act is closing fast". He is talking about how fast the work on AI is being done. Even Stephen Hawking said that, AI could lead to the destruction of mankind. And this video is the proof of it. So we have to act before it is too late.