De Niro has been one of Hollywood's most outspoken critics of President Donald Trump.
In addition to its appearance, the package also had the same return address as the others: that of Democratic Rep. The package was addressed to former CIA Director John Brennan. Officials removed the device from the scene.
The CNN bureau in NY received a package addressed to Mr Brennan, who has appeared as a CNN analyst, leading police to evacuate the Time Warner building in Manhattan near Central Park. The devices were made from PVC pipe and covered with black tape.
Washington radio station WMAL has said it also received a suspicious package and is now being evacuated.
A suspicious package addressed to Waters was intercepted at a House mail facility, two sources told CBS News. Officials searched those images overnight and found several other suspicious packages, a law enforcement official said.
The motive is unknown, but the recipients are all prominent targets of right-wing criticism and, in many cases, of Trump himself. Debbie Wasserman Schultz of Florida, the sources said. "I strongly suspect he wanted that package to go to her".
The Secret Service said the Clinton and Obama packages were "identified during routine mail screening procedures" and that neither were ever at risk of receiving them.
The parcel intended for Holder ended up rerouted to the return address printed on all the packages - the Florida office of U.S. Representative Debbie Wasserman Schultz, a former chair of the Democratic National Committee, according to the Federal Bureau of Investigation. But FBI and other investigators had been responding to a US Postal facility in DE that morning, FBI spokesman Dave Fitz said. It matches the description of those sent to the other officials.
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One of the explosives was sent to CNN, which prompted the evacuation of the Time Warner Center in Manhattan, where CNN has offices. The former Central Intelligence Agency director frequently appears on CNN.
Authorities said they recovered a second package addressed to Biden at a facility in New Castle Thursday morning after a similar package was addressed to him Wednesday.
The package, now considered suspicious because of similarities to others, was misaddressed and returned to sender. Debbie Wasserman Schultz's office in Sunrise have been removed by law enforcement.
"I've been governor of NY for seven years, I've faced many terrorism situations, and this works on multiple levels". The Los Angeles Police Department said it was investigating another package found at a mail facility near Downtown Los Angeles.
"The building is open and everybody is safe", she told CNN.
An initial examination shows they are are rudimentary but functional, and have similar construction.
Several packages containing pipe bombs packed with shards of glass have been intercepted in the last few days. The bombs were unstable and could have been set off just by handling, sources said.
Law enforcement officials said all the packages were similar: manila envelopes with bubble-wrap interior bearing six stamps and the return address of Florida Rep. "We're not Democrats and Republicans - we're Americans - our flag is red, white and blue, we're one nation".
"Let's say for example, that maybe these bombs aren't operational".