Sayoc was taken into custody at an auto parts store in Plantation, Florida where a huge nationwide manhunt mobilizing hundreds of agents, had reportedly concentrated in recent hours.
Like earlier targets, both Biden and De Niro have been sharply critical of Trump.
"The media has been unbelievably unfair to Republicans, conservatives, and certainly to me", he said Friday.
In southern Florida, FBI agents and police swarmed the strip mall in Plantation, where an AFP photographer saw a van covered in blue tarpaulin loaded onto a truck by authorities and driven away.
None of the nine devices exploded and no injuries were reported, but some top Democrats called the threats a symptom of a coarsening brand of political rhetoric promoted by Trump, who also condemned the acts. "We can not let it happen".
Trump has blamed the media for this and have asked them to play a responsible role.
'Do you see how nice I'm behaving?'
"I heard he was a person that preferred me over others", he told reporters.
White House, CNN Engage In War Of Words Over Explosives Packages
Pop singer Madonna told the Women's March previous year that she had "thought an terrible lot about blowing up the White House". Trump has labeled CNN and other news outlets as the "enemy of the people".
In turn, Mr Trump has called the former United States vice president "Crazy Joe" and "mentally weak".
All the packages were sent in manila envelopes with bubble wrap, marked with computer-printed address labels.
Harris was mentioned in the criminal complaint as a target known to federal investigators.
Fox Business host Lou Dobbs, a longtime confidant of the president, on Thursday suggested in a since-deleted tweet that the intercepted packages were "fake". It wasn't clear whether the parcel he addressed in his statement might be connected to this case.
Authorities believe the packages, which were intercepted before reaching their intended recipients, all went through the US Postal Service at some point, a source said.
Earlier Friday, a 12th device addressed to former director of National Intelligence James Clapper had been found.
All of them were sent to people who have criticized or clashed with President Donald Trump, and authorities continued to warn Friday that others could still be out there.
The FBI has reportedly been searching a mail facility in Florida for clues about the packages.
The stickers on the van included "CNN Sucks" and other pro-Trump and anti-Democrat messages, which tracks some of President Trump's campaign-trail rhetoric. "No question about it in my mind".
Hard to accommodate Loftus-Cheek in first team - Sarri
Chelsea have one foot in the Europa League knockout stages after Ruben Loftus-Cheek's hat-trick sank BATE Borisov . Chelsea remain unbeaten under Maurizio Sarri .
A second package, addressed to James Clapper, the former director of national intelligence, at CNN's newsroom in NY, was found in a mail facility in the city.
Authorities who have discovered the parcels around the country - in NY, outside Washington, D.C., in Florida and in Los Angeles - are sending them to the FBI Laboratory in Quantico, Va., for examination there.
A police bomb squad was responding to a post office in Midtown Manhattan to check out the item, which was discovered by postal workers.
A package was intercepted at a NY post centre, reportedly addressed to James Clapper.
DNA evidence reportedly links the unnamed mail to the suspicious packages.
A man has been taken into custody in connection with a series of suspicious packages sent to major political figures, according to a report by CNN. They later cited police who said it was a cell phone. Those on the receiving end of the IEDs include former President Barack Obama, former President Bill Clinton, former Secretary of State Hillary Clinton, former Vice President Joe Biden, Democratic megadonor George Soros, former CIA Director John Brennan, Democratic Reps.
"I thank God no one's been hurt, and I thank the fearless and resourceful security and law enforcement people for protecting us", De Niro said of the incident in a statement obtained by EW. Bomb experts and security analysts say that based on their rudimentary construction it appeared they were more likely created to sow fear rather than to kill.
He revisited his attacks Thursday morning on Twitter.
Court records show Sayoc, an amateur body builder with social media accounts that denigrate Democrats and praise Trump, has a history of arrests for theft, illegal steroids possession and a 2002 charge of making a bomb threat.
United Nations official: Khashoggi was victim of an extrajudicial execution
A columnist for The Washington Post, Khashoggi was last seen on October 2 when he entered the Saudi Consulate in Istanbul. The CIA's Haspel heard an audio recording of Khashoggi's death during a trip to Turkey this week, sources told Reuters .