Following the news that two ricin-laced letters sent to New York Mayor Michael Bloomberg and gun control group Mayors Against Illegal Guns were postmarked in Shreveport, Mayor Cedric Glover has issued a statement saying the city is "taking necessary steps" to protect citizens.

"The Shreveport Police Department, in conjunction with the FBI and the Joint Terrorism Task Force is working to apprehend those responsible for sending ricin-laced mail from a local post office," said Glover.

Glover said that while the letters were postmarked at a Shreveport postal station, the origin of the mail is still unclear. He added that citizens should remain "calm but alert."

his personal Twitter page to urge Shreveporters to "stay tuned to local media sources and outlets for information on how to assist with the apprehension of those responsible."