Federal prosecutors say an improvised explosive device directed at former U.S. Attorney General Eric Holder Jr. was addressed to his office at a Washington, D.C., law firm, but ultimately delivered to a return-to-sender address in Florida. Holder is a partner at Covington & Burling.

Prosecutors on Friday charged Cesar Altieri Sayoc with mailing approximately 13 packages containing explosives with the intent to injure prominent former public officials, particularly those closely associated with the Democratic Party, according to a complaint filed in the Southern District of New York.