SALIX (AP) - Authorities say a man has died after he was buried in soybeans at the Ag Processing Inc. plant near Salix in northwest Iowa.

The Woodbury County sheriff's office says 20-year-old Matthew Ball, of Manson, was cleaning the inside of the concrete bin Monday afternoon when the soybeans shifted.

Deputy Kent Roepke (REP'-kee) says Ball was knocked off his feet and buried. Emergency crews emptied the soybeans out of a hole in the bottom of the bin to find the trapped man.

Roepke says Ball was buried for about an hour and was dead when he was pulled out.

Four other workers were injured. Authorities say their injuries were non-life threatening.

Officials say the men were employed by a contractor doing work at the plant. No additional details were released.