US President Donald Trump blamed news media outlets on Thursday for stirring up anger and hateful political rhetoric as two more suspicious packages were discovered, addressed to former vice-president Joe Biden and actor Robert De Niro.
"We are working quickly to process and analyze relevant information from the suspicious packages recovered over the last few days", said Bill Sweeney, the assistant director in charge of the FBI New York. Cory Booker and former National Intelligence Director James Clapper - and similar in appearance to pipe bomb devices sent to other prominent Democrats - have been intercepted, the Federal Bureau of Investigation said Friday, as investigators scrambled from coast to coast to locate the culprit and motives behind a weird plot aimed at critics of President Donald Trump.
With Thursday's discoveries, at least 10 suspicious packages, all similar in appearance, have been found this week addressed to eight people who are prominent Democrats or high-profile critics of Donald Trump.
On Thursday, a police bomb squad removed a similar-looking device, also treated as explosives, that was sent to double Oscar-winner De Niro at the TriBeCa Productions company he co-founded in NY.
Authorities already were aware at least one Biden package by Wednesday; it had been misaddressed and returned to sender, and postal officials were trying to track it down, two law enforcement sources said.
"BTW, your critics will not be intimidated into silence", Brennan said. Brennan advises Trump to "try to act Presidential".
New details about the devices came as the four-day mail-bomb scare spread nationwide, drawing investigators from dozens of federal, state and local agencies in the effort to identify one or more perpetrators.
Bomb squad and canine units joined Federal Bureau of Investigation agents late on Thursday to examine a sprawling USA mail distribution centre at Opa-Locka, northwest of Miami, Miami-Dade County police said.
It came on the same day two packages directed to former United States vice-president Joe Biden was intercepted.
"I can tell you this: we will find the person - persons responsible, and we're going to bring them to justice", Sessions said.
The package addressed to him was discovered at a postal facility in Manhattan that is near several Broadway theaters. On Friday, postal officials intercepted the package for Clapper, a CNN contributor, before it could reach the CNN offices, where it was addressed, according to the network.
The FBI said the packages found so far had shared characteristics, including manila envelopes with bubble-wrapped interiors. It was not delivered and was instead sent to the labeled return address - listed as Wasserman Schultz's office.
Sarah Flores, a spokeswoman for the Justice Department, said a news conference is scheduled for later Friday.
The CNN bureau in NY received a package addressed to Mr Brennan, who has appeared as an on-air CNN analyst, leading police to evacuate the Time Warner building in a busy Manhattan neighbourhood near Central Park.
Similar packages addressed to Mrs Clinton and Mr Obama were intercepted on their way to Mrs Clinton's NY home where she lives with former President Bill Clinton and to Washington, where Mr Obama lives with his wife, Michelle.
"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. Rep. Maxine Waters (D-CA), Sen.
The bombs have heightened tensions during the closing days of a highly contentious campaign ahead of the November 6 elections in which Democrats are battling to seize control of Congress now held by Trump's Republican Party.
"Stop blaming others. Look in the mirror", Mr Brennan tweeted. Debbie Wasserman Schultz (D-Fla.) as a return address.
USA media has reported that much of the investigation has focused on Florida, where officials believe that at least some of the packages were dispatched. Electrical wires leading out of the pipe led to an electric timer taped to the pipe, according to law enforcement officials speaking on condition of anonymity to discuss the investigation.
De Niro released a statement Friday calling on Americans to vote.
The series of bomb alerts began on Monday, when a suspected device was found in the post box of billionaire businessman George Soros, a major Democratic Party donor.