New York City Mayor Michael Bloomberg. Photo: wiki commons.

Politico – Letters sent to New York City Mayor Michael Bloomberg and his anti-gun violence group appeared to include the substance ricin and also issued threats to Bloomberg that referenced gun issues, the chief spokesman for the New York City Police Department confirmed in a statement on Wednesday.

“Anonymous threats to Mayor Michael R. Bloomberg in letters opened in New York City on Friday and by the director of the Mayors Against Illegal Guns in Washington, DC on Sunday contained material that when tested locally, preliminarily indicated the presence of ricin,” New York City Police Department Deputy Commissioner Paul J. Browne said in a statement.