Two more suspicious packages have been intercepted this morning, one in New York, and one in Florida.
FOX's Rachel Sutherland reports from Washington:
Former Director of National Intelligence James Clapper and Democratic Senator Cory Booker are the latest targets in a string of suspicious packages apparently intended for high-profile Democrats.
A package addressed to Clapper was found at the 52nd Street post office in New York City. A New York police source tells Fox News it's similar to the other packages.
The package to Senator Booker was discovered at a large postal facility outside Miami, where the FBI has been on the scene. Authorities are going over surveillance tape from the facility, as well as from nearby businesses.
Rachel Sutherland, FOX News.
Follow Rachel Sutherland on Twitter: @SutherlandFOX