Investigators Look to Florida Post Office for Clues About a String of Pipe Bombs

Miami-Dade Police said Thursday that they are assisting federal partners in their search of a U.S. Postal Service mail facility in Opa-locka, Fla. as part of the ongoing investigation into a series of pipe bombs sent to high-profile Democrats and the New York offices of CNN.

Law enforcement officials have intercepted at least 10 explosive devices addressed to two former U.S. presidents, sitting representatives, a billionaire philanthropist and others.