WHAT IS KNOWN ABOUT THE EXPLOSIVES SENT TO PROMINENT DEMOCRATS AND CNN:
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HILLARY CLINTON AND TWO FORMER PRESIDENTS
All the confirmed bombs appeared to come from the same person or persons, said John Miller, the New York Police Department's head of intelligence and counterterrorism, who briefed reporters in New York.
The Secret Service intercepted a bomb addressed to Hillary Clinton at the Chappaqua, New York, home she shares with former President Bill Clinton, and another that was sent to former President Obama at his home with Michelle Obama in Washington.
Neither the Clintons nor the Obamas had been at risk of receiving the packages because of screening procedures, the Secret Service said.
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CNN
A bomb squad removed another device from CNN's New York headquarters, which was evacuated.
The package contained a live explosive and an envelope with white powder and the substance was being tested to see if it was dangerous, authorities said.
The device was addressed to former CIA director John Brennan, who regularly appears as a television contributor and who has publicly clashed with Trump.
Trump and his aides routinely criticise CNN over its coverage and the president calls the network an example of "fake news".
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GEORGE SOROS
A suspicious device was found Monday at the New York compound of billionaire George Soros, a major contributor to Democratic causes. Investigators believe the explosive discovered near the Clintons' home was linked to the one at the compound.
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DEBBIE WASSERMAN SCHULTZ
All of the envelopes listed Representative Debbie Wasserman Schultz as the return address. The FBI also said it was responding to a report of a suspicious package at one of Schultz's offices in Florida.
She is the former chairwoman of the Democratic National Committee who was accused by Clinton rivals of secretly boosting the former secretary of state to the party's 2016 presidential nomination.
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ERIC HOLDER
The FBI says Holder, the country's chief law enforcement officer for most of the Obama administration, was the intended target of a device that was similar to the others but that was sent to the wrong address.
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MAXINE WATERS
The FBI late on Wednesday confirmed two additional packages addressed to Representative Maxine Waters had been intercepted that were similar in appearance to five others.
The outspoken Democrat is frequently criticised by Trump.
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WHAT WE DON'T KNOW
How dangerous the bombs were. The pipe bombs were packed with powder and shards of glass. The devices, each with a small battery, were made from PVC pipe about 15cm long and covered with black tape, said a law enforcement official who viewed X-ray images.
There may be other devices out there, undelivered.
