pipe bombs
US investigators search for person who sent mail bombs, motive
Three more devices were linked to the plot — two addressed to former VP Biden and one to Robert De Niro — bringing the total to 10.
FBI searches Florida mail centre in hunt for sender of package bombs
Investigators are treating the devices as 'live' explosives, not a hoax, said James O'Neill, police commissioner of New York City.
Alabama executes inmate, 83, oldest in modern US history
A group called Americans for a Competent Federal Judicial System claimed the attacks.
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