Death Machines (1976)

Madame Lu has created three Death Machines a trio of martial arts experts who have been injected with a special serum turning them into mindless zombies capable only of murder at Lus command Tasked with eliminating her enemies the Death Machines go on a bloodsoaked rampage killing anyone in their path After they massacre an entire dojo leaving only one survivor the Death Machines and Madame Lu herself become the targets of his vengeance