Authorities in Mexico City are reporting the theft of radioactive material–it is the fourth theft in less than two years. Some worry that terrorists are stealing this radioactive material for a dirty bomb.

Mexican authorities, though are trying to ally fears by saying the criminals may not have known they were stealing radioactive materials. Riiiiight.
Authorities appealed for help among Mexico’s population Thursday to locate stolen radioactive material, as the fourth such theft in less than two years prompted officials to mull new security measures.
The interior ministry issued an alert in five southern and eastern states late Wednesday, two days after a toolbox-sized container carrying the Iridium-192 source was snatched from a truck in a residential parking lot in Cardenas, Tabasco state.
Officials suspect that, like in three other cases since 2013, the thieves were not aware that they were stealing a potentially deadly radioactive source.
So, what do you think? Are Mexican officials right that this is no big deal?