Chryslersays it has suspended some plant workers caught by a Detroit television station drinking alcohol and smoking what appeared to be marijuana during breaks.
Chrysler manufacturing chief Scott Garberding told WJBK-TV in a report that aired Wednesday night that the automaker has identified some of the workers.
WJBK said it received a tip from a worker at Chrysler's Jefferson North plant and followed about a dozen men for 10 days during their lunch breaks.
It filmed them going to a convenience store to buy alcohol and taking it to a nearby park to drink and smoke.
Garberding says the workers' "behavior is totally unacceptable." The United Auto Workers said it strongly opposes the use of alcohol or controlled substances on the job.