SANDWICH -- Cape Cod authorities appealed Friday for public help to identify the decapitated, limbless body of a man found wrapped in a tarp on a Sandwich beach this week.

Cape and Islands District Attorney Michael O'Keefe said the body is that of a black man believed to have been around 6 feet tall and weighing 220 to 230 pounds. He said the body has old surgical scar on right side of the abdomen, but no signs of serious disease.

O'Keefe said the man likely was killed elsewhere fairly recently and dumped at Town Neck Beach, where a passer-by found it Wednesday night.

He said the man was wearing black sweat-type pants and a dark blue t-shirt with the name of Cranston Windustrial. The shirt has promotional messages for the Warwick, Rhode Island business O'Keefe said been "extremely cooperative" with investigators. O'Keefe said the company gave away thousands of the shirts, made between six and eight years ago.

O'Keefe said the body was attached to a blue moving dolly.

He said authorities are appealing to people across New England who might remember someone of the same description wearing the shirt or a similar dolly being missing.

"We want to cast a fairly broad net on this," he said.