YOUNGSTOWN, Ohio (WKBN) – No one was hurt after a roof of a warehouse in Youngstown collapsed Friday morning.

It happened at 3424 Oregon Ave.

The building is used by RW Sidley, Inc., according to the company’s website. The company is a supplier for the building industry.

Warehouse roof collapse Youngstown

A worker on the job at Meridian Drive-Thru saw it happen and called 911. She was afraid that someone might be underneath it.

We’re told it was used for storage, and no one was there at the time.

The cause of the collapse is unknown,