LINCOLN, Neb. (AP) — A 58-year-old man has died after being pinned down by a concrete wall at a Lincoln recycling plant.

Lincoln Police Capt. Danny Reitan said one of two employees who were taken to a hospital has died after the wall fell over Thursday afternoon at the Mid America Recycling plant.

Reitan says employees were cleaning up when a skid loader hit a concrete dividing wall. A portion of the wall apparently collapsed, pinning one employee and grazing another.

The condition of the other injured employee is unknown.

Police have not released the names of those involved as they continue to investigate the incident.