The official said another package addressed to Biden was also found Thursday morning, that one at a postal center in New Castle, Delaware.
At least eight parcels were intercepted before reaching any intended recipients, including Obama's attorney-general, Eric Holder, former Central Intelligence Agency director John Brennan and prominent Democratic Party donor George Soros.
Oil edges back from big slump as Iran sanctions return to focus
Distillate inventories were down this week by 2.4 million barrels, compared to a larger expected draw of 1.927 million barrels. If US crude drops below US$65, a psychologically important figure, that could trigger further technical selling, traders said.
The NYPD bomb squad responded and examined the device under an X-ray. The bombs were unstable and could have been set off just by handling, sources said.
The motive is unknown, but the recipients are all prominent targets of right-wing criticism and, in many cases, of Trump himself.
"A very big part of the Anger we see today in our society is caused by the purposely false and inaccurate reporting of the Mainstream Media that I refer to as Fake News", Trump tweeted.
A package containing a "live explosive device", according to police, received at the Time Warner Center which houses the CNN New York bureau, in New York City, is shown in this handout picture provided October 24, 2018. It was addressed to Robert De Niro and is similar packaging to the others.
There has been no claim of responsibility.
On Wednesday night, President Donald Trump condemned the apparent act of terror.
Monolithic rectangular iceberg photographed by Nasa
Once they split from an ice shelf, they are often geometric in shape. What you're looking at here is a tabular iceberg .
Maxine Waters: The US representative said in a statement that Capitol Police informed her that her Washington, DC office was a target of a suspicious package on Monday.
The president tweeted that mainstream media must "clean up its act".
The package, found on the seventh floor of 375 Greenwich St.in New York City's Tribeca neighborhood, was reported to police around 4:45 a.m. The five packages discovered Wednesday all had a similar return address: That of Democratic Congresswoman Debbie Wasserman Schultz, but with her name misspelled.
Police said the package had been delivered either Tuesday or Wednesday, WCBS said.
He also called for more civility in public life, saying: "Those engaged in the political arena must stop treating political opponents as being morally defective".
Pliskova recovers to beat defending champion Wozniacki at WTA Finals
Kvitova's trademark firepower moved Svitolina around the hard court but the Ukrainian's defence was up to the task. The tournament will be played from Sunday October 21st to Sunday October 28th at the Singapore Indoor Stadium .
"The FBI will continue to work with our federal law enforcement partners at the United States Secret Service, United States Postal Inspection Service, and Bureau of Alcohol, Tobacco, Firearms and Explosives, as well as our state and local law enforcement partners, to identify and arrest the person or people responsible for sending these packages", the FBI statement said.