This has happened before in Mexico. Perhaps the worst event was when radioactive material was discarded in the huge waste pile surrounding Mexico City. Some kids found a heavy canister, opened it, then used the silvery powder inside as body makeup.
The trouble is that except for the robberies of radioactive material, there are rarely any follow up stories of what happened to the victims.
Also in Brazil
https://en.m.wikipedia.org/wiki/Goi%C3%A2nia_accident
In Brazil, too:
https://en.wikipedia.org/wiki/Goiânia_accident