From The Register:

An American “Reaper” flying hunter-killer robot assassin rebelled against its human controllers above Afghanistan on Sunday, and a manned US fighter jet was forced to shoot the rogue machine down before it unilaterally invaded a neighbouring country.

The Reaper, aka MQ-9 or Predator-B, is a large five-ton turboprop powered machine able to carry up to 14 Hellfire missiles – each capable of destroying a tank or flattening a building. It is used by the US and British forces above Afghanistan as a “persistent hunter-killer against emerging targets”.

According to USAFCENT Public Affairs:

The aircraft was flying a combat mission when positive control of the MQ-9 was lost. When the aircraft remained on a course that would depart Afghanistan’s airspace, a US Air Force manned aircraft took proactive measures to down the Reaper in a remote area of northern Afghanistan.The statement goes on to say that the errant killdroid “impacted the side of a mountain” and that there “were no reports of civilian injuries”.

And then William Gibson’s perfectly timed and executed snark-tweet:

GreatDismal That Reaper drone went rogue because it had heard of a wedding party in the adjacent country. They have a taste, now.