A.S.S found!

"Damn it!" the major exclaimed and exited the room immediately, running upwards. Lex did not follow him, but sped up retrieving the servers as much as he could. The sound of fighting above him became more intense, and the shaking became more common.

As easy as he found it to kill the robots, he was certain of the fact that normal humans with regular guns could not harm them. The fact that there was a fight going on upstairs indicated that the facility clearly had more defensive measures prepared than just soldiers with guns. What he was concerned about was why the defense failed so suddenly. The change was too abrupt, with no time for any warning.

If more robots had arrived, thereby increasing the numbers of attackers, to overwhelm the formation, someone would still have had enough time to find the major and give a warning. It was worth investigating.