The mishap occurred at Thea Enterprises on Allwood Road shortly before 8 a.m., they said.
Colleagues and responders conducted CPR after the out-of-state delivery driver was pulled out from under the load, which had fallen off a flatbed trailer, responders said. He was later pronounced dead at the hospital, they said.
Passaic County Prosecutor Camelia Valdes was expected to release further information sometime Thursday.
Clifton police and firefighters responded along with an ALS unit. OSHA was notified.
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