India, Oct. 15 -- Federal Bureau of Investigation officials, United States Postal Inspection Service representatives, and Capitol Police personnel are conducting investigations into letters containing potentially hazardous materials that were dispatched to various congressional offices, as communicated through electronic messages distributed to Capitol Hill personnel on Thursday, NY Post reported.

The warning notice contained an image depicting one of the questionable parcels bearing a postmark from 'DSA' and displaying a return address located at the identical Financial District structure previously referenced by the Democratic Socialists of America on their membership documentation.

"Law enforcement officials are working to intercept ...