Everything is heading towards making the Screamers movie a reality :o

Five years into the war, Alliance scientists created and deployed Autonomous Mobile Swords (AMS) — artificially intelligent self-replicating machines that hunt down and kill N.E.B. soldiers. Nicknamed “Screamers” after their signature high-pitched noise, they are efficient at killing any target with a heartbeat, so Alliance soldiers wear “tabs” that disguise their heartbeats, thus rendering them invisible to the machines. A fragile stalemate is in effect between the two exhausted, poorly-supplied, and undermanned armies.

https://en.wikipedia.org/wiki/Screamers_(1995_film)