Two suspicious packages discovered at Delaware postal facilities

The FBI continues its investigation Thursday into multiple suspicious packages that were mailed to prominent Democratic figures over the last several days.&nbsp;The packages, which were all mailed in manila envelopes and contained &quot;potentially destructive devices,&quot; are being sent to the bureau&#39;s laboratory in Quantico, Virginia,&nbsp;<a href="https://www.fbi.gov/news/pressrel/press-releases/statement-on-the-fbis-investigation-of-suspicious-packages" target="_blank">for more testing</a>.&nbsp;The FBI is looking into packages addressed to former President Barack Obama, former Secretary of State Hillary Clinton as well as other current and former Democratic officials, a Democratic donor and CNN.&nbsp;A former investigator for the U.S. Secret Service&nbsp;<a href="https://apnews.com/fb783cc390b2458b9f7cd84ce8170caa" target="_blank">told the Associated Press</a>&nbsp;that the FBI will be searching for any DNA or fingerprints left on the packages by the person who sent them. He said investigators will also track how each package went through the postal system and take apart the devices to see if the components match other explosive devices recovered from previous incidents.&nbsp;While speaking&nbsp;<a href="https://www.foxnews.com/politics/trump-hosts-wisconsin-rally-as-feds-probe-explosive-devices-sent-to-top-dems" target="_blank">at a campaign rally</a>&nbsp;in Wisconsin Wednesday evening, President Donald Trump called for unity and said anyone found responsible will be brought to justice.&nbsp;&quot;Any acts or threats of political violence are an attack on our democracy itself. ... Such conduct must be fiercely opposed and firmly prosecuted,&quot; President Trump said.&nbsp;The FBI warned the public to remain vigilant because more suspicious packages could&#39;ve been mailed out. The U.S. Postal Service&nbsp;<a href="https://about.usps.com/posters/pos84.pdf" target="_blank">advises not opening</a>&nbsp;any letters or packages that don&#39;t have a return address, use excessive postage or have protruding wires.&nbsp;Additional reporting from&nbsp;<a href="https://www.cnn.com/" target="_blank">Newsy affiliate CNN</a>.&nbsp;<hr>Trending stories at <a href="http://www.newsy.com">Newsy.com</a><ul class="inline-related-links"><li><a href="http://www.newsy.com/stories/ny-sues-exxon-for-allegedly-misleading-investors/">New York Sues Exxon Mobil For Allegedly Misleading Investors</a></li><li><a href="http://www.newsy.com/stories/federal-reserve-banks-say-nafta-won-t-help-dairy-farmers/">Federal Reserve Banks Say The New NAFTA Won&#039;t Help US Dairy Farmers</a></li><li><a href="http://www.newsy.com/stories/fbi-confirms-similarities-between-suspicious-packages/">FBI Confirms Similarities Between Suspicious Packages</a></li></ul>

By: CNN,Scripps National

Authorities have now found two packages addressed to former Vice President Joe Biden that are similar in appearance and contain potential explosive devices that resemble the others sent earlier this week to prominent critics of President Donald Trump and CNN, a law enforcement official said Thursday.

The two packages, discovered at Delaware postal facilities, were removed late Thursday morning, law enforcement officials said.

Earlier Thursday, a suspicious package addressed to actor-director Robert De Niro was reported at the Manhattan building where his production company is based, and its marking and contents appear similar to the other pipe bomb packages, two law enforcement sources said.

The FBI said Thursday morning that the three packages are "similar in appearance to the others."

A manhunt is underway for the perpetrator behind the packages. Law enforcement authorities are treating the series of bombs as a domestic terror matter and are advising the public to remain vigilant.

The motive is unknown, but the recipients are all prominent targets of right-wing criticism and, in many cases, of Trump himself. The package found at CNN's New York bureau in the Time Warner Center was addressed to former CIA Director John Brennan, city and local law enforcement officials said.

Devices sent to former President Barack Obama, Hillary Clinton, former Attorney General Eric Holder, California Democratic Rep. Maxine Waters and Democratic donor George Soros showed the presence of a sulfur substance, which could have exploded, a law enforcement official said.

The devices are believed to be pipe bombs, inherently unstable, and at risk of being set off just by handling.

The FBI's counterterrorism division is leading the investigation Thursday into the packages and the agency says it's possible additional packages were mailed to other locations.

At the White House, Trump vowed Wednesday that "we will spare no resources or expense" to pursue the perpetrator.

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Two suspicious packages discovered at Delaware postal facilities

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