Updated at 11:34 a.m. ET
Authorities have arrested one person in connection with the wave of suspicious packages sent this week to political enemies of President Trump, the Justice Department said on Friday.
FBI special agents arrested a man in South Florida. Further details about the arrest weren't immediately clear.
FBI and other investigators surrounded a white van in a parking lot in Plantation, Fla., on Friday morning believed to be connected to the case; their inspection was shown live on cable TV and the van was loaded onto a flatbed truck.
A press conference was scheduled for 2:30 p.m. on Friday at the Justice Department in Washington D.C.
The announcement followed the discovery of more packages bound for political foes of President Trump on Friday, including one addressed to Sen. Cory Booker, D-N.J., and one to former intelligence boss James Clapper.
The recovery of those two envelopes brought the known total to 12 parcels addressed to 10 targets, all of whom are critics or opponents of the president.
The package addressed to Booker was found in Florida, the FBI said; each of the envelopes in the case so far has borne the office of Democratic Rep. Debbie Wasserman Schultz as its return address.
The package addressed to Clapper was bound for CNN's office in New York City — which also received an earlier parcel this week addressed to former CIA Director John Brennan.
Authorities intercepted the Clapper envelope at a mail processing center in Manhattan before it reached CNN. The New York Police Department's bomb squad removed it safely.
None of the suspicious devices included in the envelopes have exploded and so far no one has been hurt. Federal authorities have acknowledged they don't know how many total packages there are and there could be more moving through the mail as the search continues both for the devices and for the person or people who sent them.
Clapper, who is a commentator on CNN, appeared on air to say, "this is definitely domestic terrorism. No question about it in my mind."
Although the evidently homemade potential pipe bombs have not exploded, authorities say they are treating them as "live devices" not "hoax devices," New York City Police Commissioner James O'Neill said Thursday.
Authorities who have discovered the parcels around the country — in New York, outside Washington, D.C., in Florida and in Los Angeles — are sending them to the FBI Laboratory in Quantico, Va., for examination there.
The Sunshine State
At least one of the packages passed through a large U.S. mail sorting facility in Opa-locka, Fla., near Miami, according to multiple reports.
The Miami Herald, citing a federal law enforcement official familiar with the investigation, reports that the package sent from the facility is likely the one that ended up on Wednesday at the south Florida office of U.S. Rep. Debbie Wasserman Schultz.
That package was originally sent to the office of former U.S. Attorney General Eric Holder. It was not delivered and was instead sent to the labeled return address — listed as Wasserman Schultz's office.
Before the package arrived there, the Herald reports it was rerouted through the Opa-locka mail sorting facility.
Federal agents and the Miami-Dade County Police Department searched the facility on Thursday night, according to reports from the Herald, Reuters and The Associated Press. No potentially explosive devices were found, according to reports.
"A search of a postal database suggested at least some may have been mailed from Florida," the AP reports.
Hundreds of thousands of packages pour into the facility every day — it's the size of five football fields, the Herald reports. Miami-Dade Police Department specialists worked at the mail center on Friday morning, the agency said.
The packages began to show up on Monday, starting with billionaire George Soros, a major donor to Democrats and Democratic causes.
In addition to Booker, Clapper and Brennan, one package has been addressed to former President Barack Obama, two to former Vice President Joe Biden, one to former Secretary of State Hillary Clinton, one to former Attorney General Eric Holder and two to Rep. Maxine Waters, D-Calif. One was also addressed to the actor Robert De Niro, a harsh Trump critic.
De Niro included a political call-out in his statement about the packages on Friday morning.
"I thank God no one's been hurt, and I thank the brave and resourceful security and law enforcement people for protecting us," he said. "There's something more powerful than bombs, and that's your vote. People must vote!"
Trump sounded the same note when he addressed the parcel attacks Friday morning on Twitter.
Trump's use of sarcasm quotes around "bomb" appeared to be an allusion to skepticism voiced by some former investigators and explosives specialists about the devices. As one expert told NPR, the apparently homemade devices look like they might include hazardous materials but not as though they could explode.
Authorities say they're treating the devices as potentially "live" and one of them has been protectively destroyed by an explosive ordnance disposal team in New York.
A wide investigation remains ongoing, with the FBI, the Postal Service and other federal agencies working with state and local authorities.
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