The device, used for measuring the density of soil, is in a yellow rectangular box with the words “Caution…Radioactive Material” written on the outside.

A mysterious container warning "caution radioactive material" was found on a Wisconsin beach on Wednesday morning. The U.S. Coast Guard reported that the responding agencies determined that the ...

The search and the NRC surveillance were triggered by the discovery Wednesday of a 200-pound lead-shielded container marked "Caution: Radioactive Material." ...