Thirteen plant workers at the Chrysler Jefferson North Assembly plant in Detroit have lost their jobs after a video showing some of them drinking during their lunch break was aired on the Detroit Fox affiliate.

"It has been determined that 13 employees engaged in behavior that violated the company's Standards of Conduct and these 13 employees were discharged today," the company said in a written statement, reported. "Two remaining employees will receive a one month disciplinary layoff without pay."

An exclusive investigation by showed workers at the plant drinking beer and smoking joints while on a half-hour lunch break just two months after President Obama praised the plant in a speech.

The TV station's investigation -- conducted over several weeks and based on tips from workers at the plant -- had outraged the auto giant's top executives, who called the behavior "totally unacceptable."

Chrysler had told it was able to identify all 15 employees captured on video and suspended them all indefinitely without pay within 36 hours of learning about the investigation's findings. On Monday, it announced it had concluded its investigation and punished the 15 workers.