Stolen Radioactive Material Found in Field --The health of a family in rural Mexico is being monitored after they pick up 60g of cobalt-60 - enough to make a dirty bomb. 06 Dec 2013 A stolen shipment of highly radioactive cobalt-60 has been found abandoned in a field in Mexico. A family took the opened medical device containing the radioactive material into their home after finding it in central Mexico state...Federal police blocked access Friday to a central Mexico hospital where six people were reported to have been admitted with radiation exposure.