Indications of a possible radiological emergency

Indications of a possible radiological emergency (hazard):

Suspected or actual bomb
Credible threats or threatening messages
Device that appears intended to spread contamination
Signs of possible contamination (e.g. spill)
Elevated gamma radiation levels
Medical symptoms of radiation injuries (e.g. burns without apparent cause)
Building / area marked with the radiation symbol
Results of assessment of a radiological assessor
Neutron radiation
Dangerous source that is lost, stolen, damaged, in a fire, leaking, or potentially involved in a terrorist act or explosion