FORT WAYNE, Ind. (WANE/AP) – The Indiana Occupational Safety and Health Administration (IOSHA) is investigating the death of a worker Monday at an Amazon fulfillment center in Fort Wayne. IOSHA opened the investigation Tuesday. It’s not known how long that investigation could take.

On Wednesday, the Allen County Coroner’s Office released its autopsy report which indicated the worker death was caused by blunt force injury and it was ruled an accident.

The coroner identified the worker as 20-year-old Caes David Gruesbeck.

Emergency crews and police were called to the fulfillment center warehouse at 9798 Smith Road on Monday afternoon after a reported industrial accident, according to the coroner.

Amazon spokesperson Maureen Lynch Vogel said Gruesbeck was driving a one-man lift and hit his head on an overhead conveyance system. He was trying to fix a jam on the conveyor, Vogel said, and he was trained to drive the lift.

Gruesbeck was taken to a local hospital where he was pronounced dead shortly after arriving there, the coroner said in a release.

Amazon employees in the fulfillment center pack customer orders, operate equipment and may work at heights up to 40 feet, according to a job description on Amazon’s website.

The fulfillment center is back open Thursday, Vogel said.