
Zombie robots were the robot guardians of Saeena's tomb on Mila Xa. They knocked out intruders with gas and imprisoned them inside the tomb.
In 2266, the zombie robots captured a landing party from the USS Enterprise and imprisoned them as well. When they tried to leave, Saeena summoned the robots to stop them, but Montgomery Scott lifted one of the robots and threw it at the rest, disabling them. The robots were all destroyed when Mila Xa exploded. (TOS comic: "The Haunted Asteroid")