Threatening letters, at least two containing a white powdery substance, were sent to NAACP offices in three states, a spokesman for the organization said Monday.
The civil rights group’s offices in Baltimore and New York City received letters with the powder, said spokesman Richard McIntire. The branch in Norfolk, Va., also received a letter, the FBI said, although it was not immediately determined whether the letter contained powder.
Marvin Cheatham, who heads the Baltimore office of the National Association for the Advancement of Colored People, said he opened the letter Friday and the substance later was identified as boric acid.
The substance found in New York had not been identified.
All three letters originated from Baton Rouge, La., said McIntire.
What the letters said was not immediately known. The FBI was investigating the letters as a hate crime.