NYPD Officers Treated After Handling Ricin Letter

Several members of the NYPD's Emergency Service Unit were treated after handling several anonymous letters addressed to Mayor Michael Bloomberg that tested positive for ricin.

The FBI and NYPD have begun investigating the letters that threatened the mayor and referenced the debate on gun laws, reports Bloomberg News .

Officers opened the letters at the city's mail facility on Gold Street in Manhattan, are being examined for minor symptoms of ricin exposure that they experienced that have since abated.