Machine mistakenly turned own while worker was inside for maintenance.

State authorities are investigating a California company after a gruesome accident killed a worker Monday.

72-year-old Leopoldo Gutierrez was cleaning an industrial meat grinder when it was turned on.

He was killed instantly.

The Central Valley Meat Company in Hanford says its reviewing what went wrong.

The state division of Occupational Safety and Health has investigated several violations at the plant in the past.