Arms experts report that autonomous machines have been responsible for human deaths in recent conflicts. This development has significant implications for the use of such technology in warfare.

The United Nations has expressed concerns about the issue, warning of a "moral red line" related to killer robots. However, experts suggest that this line may have already been crossed.

Further details about the incidents and the U.N.'s stance on the matter are available from the source, providing more insight into the complex issue of autonomous machines and their role in conflicts.