There was a story about 20'ish years ago where some homeless or gypsies in either Western Russia or Ukraine were barely making it through a really cold winter.
While going through a local dump, one of the guys came across a box that was quite warm to the touch. The article may have even mentioned that the box had a small pleasant glow in the dark...can't remember for sure.
He brought this treasure back to their camp and it helped keep them from freezing to death that night as they all snuggled up to the warmth.
They all fell extremely ill and were dead in like 3 days. Local doc that was called to the camp on day 2 figured it out but not before being fatally poisoned as well.
Supposedly the box was discarded by a radiology lab with common garbage so they didn't have to do paperwork and pay fees for proper disposal.
I think the "authorities" put the "hot" deceased and the radioactive shit in the same barrels to store (probably dumped in a damn hole or off their coast).
Ciudad Juárez cobalt-60 contamination incident - Wikipedia
en.wikipedia.org