TUSTIN, Calif. —  An Orange County tree trimmer feeding branches into a wood chipper was pulled into the shredding machine and killed.

The name of the worker is being withheld until relatives can be located.

The Wednesday afternoon accident in Tustin is being investigated by the California Occupation and Safety Health Administration.

Police called to the residential area just after 4 p.m. found the landscape worker's body inside the wood chipper. It isn't clear if the victim was a man or a woman.

Wood chippers shred branches and tree trimmings into mulch.

Thirty-one people have been killed in wood chipper accidents between 1992 and 2002, according to a 2005 Journal of the American Medical Association report.