[concerned about politics]

Some of the policemen began bleeding from the ears and nose after the meal

Holy cow! That's some nasty stuff.
Check for Iranians in the kitchen.

[JimSEA]

The only thing close in what small reading I have done is Ricin:

Ingestion: If someone swallows a significant amount of ricin, he or she would develop vomiting and diarrhea that may become bloody. Severe dehydration may be the result, followed by low blood pressure. Other signs or symptoms may include hallucinations, seizures, and blood in the urine. Within several days, the person’s liver, spleen, and kidneys might stop working, and the person could die.

The easiest place I have found to look is CDC Facts.