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A law enforcement official says a package addressed to former Vice President Joe Biden appears similar to packages containing bombs sent to prominent Democrats and has been intercepted at a Delaware mail facility.
The official wasn't authorized to discuss an ongoing investigation publicly and spoke to The Associated Press on Thursday on the condition of anonymity.
The FBI confirms there is law enforcement activity at the U.S. mail facility in New Castle, Delaware. It says federal agents and New Castle County Police are responding to the facility.
Several packages containing pipe bombs packed with shards of glass have been intercepted in the last few days. They targeted Hillary Clinton, former President Barack Obama, CNN and others. A New York City police bomb squad has recovered a suspicious package addressed to Robert De Niro.
None of the bombs detonated, and nobody was hurt.
-By Eric Tucker and Michael Balsamo
New York police say they're responding to reports of a suspicious package.
It's unclear if the report is related to pipe bombs sent to prominent Democrats including Barack Obama and Hillary Clinton.
The New York Police Department says Thursday's report involves the Tribeca neighborhood in Manhattan. A bomb squad unit on Thursday morning drove in a caravan through the city after leaving the neighborhood.
Authorities said on Wednesday the pipe bombs were packed with shards of glass and were intercepted. None of the seven bombs detonated, and nobody was hurt as authorities in New York, Washington, D.C., Florida and California seized the suspicious packages.
One of the explosives was sent to CNN, which prompted the evacuation of the Time Warner Center in Manhattan, where CNN has offices.