Where I live, for that kind of incident the employer would be obligated (as in, $50k worth of fines and likely criminal charges if you don’t) to report it to an independent investigator to determine who was at fault; the person cut the lock would be liable for a fine, and the employer would have to prove that they adequately trained the employee before allowing them to work in a high risk area, or the health and safety officer and company directors could be found criminally liable