EDITORS NOTE: This story has been updated throughout.

A man died after being trapped under a box trailer Tuesday morning, according to Pharr authorities.

At about 9:38 a.m., Pharr firefighters responded to the Penske Truck Leasing location at 4001 N. Cage Boulevard regarding a man entrapped under a box trailer, Fire Department Chief Pilar Rodriguez said.

The man who died was working on the truck when it fell on him, authorities said.

Firefighters were able to extricate the man, but he succumbed to his injuries.

"What we know is one of the employees was working on one of the trucks, and somehow fell on top of the employee," Pharr police Chief Andy Harvey said. "It's only one employee who was injured fatally, obviously, but nobody else was injured. It's just a really unfortunate, awful accident, but really, it's a workplace accident, and we're investigating the incident."

A representative for Penske Truck Leasing issued the following statement: 

"Penske Truck Leasing extends its deepest sympathies to everyone affected by the unfortunate accident at its Pharr, Texas location. The victim was not a Penske employee as previously reported by some news outlets. No Penske employees or equipment were involved in today’s incident. Penske is committed to safe operations and is fully cooperating with authorities in their review of this matter."

Harvey says the Occupational Safety and Health Administration will be called in to investigate.