It was around 8:30 p.m. when firefighters responded to the 800 block of Brill Street for a report of an industrial accident.
When they arrived, they found a 34-year-old man with his arm cut off at the forearm.
The rescuers, however, were not able to find the missing limb right away.
They later determined that the man severed his own arm, then cut that dismembered portion again before trying to discard it.
The man was rushed to Albert Einstein Medical Center for treatment of his injuries and a psychiatric evaluation.