WASHINGTON (USA Today Network) - Three more bomb-like devices were discovered Thursday, one in Lower Manhattan near the offices of Robert De Niro and two in Delaware addressed to former Vice President Joe Biden, bringing to 10 the number of devices addressed to high-profile critics of President Donald Trump.

The three packages discovered Thursday were found a day after at least seven packages were delivered to prominent Democratic politicians and media figures. None of the 10 suspected bombs have exploded and no one has been injured.

The packages addressed to Biden were found in two Delaware post offices, one in New Castle and another in Wilmington, according to federal law enforcement authorities. A county police bomb disposal unit was at the Wilmington site. That package had similar markings and characteristics as the packages containing bombs on Wednesday.

The FBI said Wednesday the five original packages were mailed in manila envelopes with bubble wrap interior.

"They were affixed with computer-printed address labels and six Forever stamps. All packages had a return address of “DEBBIE WASSERMAN SHULTZ” (sic) in Florida," the agency said. Wasserman Schultz, a Florida congresswoman, is the former chairwoman of the Democratic National Committee and often criticizes the president.

The packages were taken to the FBI lab in Quantico, Virginia, for examination.

Biden spokesman Bill Russo declined to comment Thursday, referring questions to the FBI.

It's unclear if Biden is in Delaware or traveling on Thursday.

A police sweep of Biden's home in Greenville, Delaware, turned up nothing Wednesday. But on Thursday morning police responded to two post offices in New Castle County.

Delaware State Police confirmed that they responded to the Quigley Boulevard Post office in New Castle at about 5:51 a.m. with FBI special agents, U.S. Postal Service Inspection Service investigators and New Castle County Police. They did not release more details.

A bomb disposal unit left the post office shortly before 10 a.m.

The Manhattan package was found in the Tribeca neighborhood at a site linked to actor and frequent critic of Trump, Robert De Niro. “At approximately 4 a.m. police received responded to a call about a suspicious package at 375 Greenwich,” Jerry Varson with the New York Police Department confirmed to USA TODAY Thursday morning.

Within the hour, the package had been removed from the location, the New York Police Department tweeted.

De Niro has been openly critical of Trump, knocking him as a "baby-in-chief" at the National Board of Review Awards in January and cursing the president at the Tony Awards in June.

According to NBC News, the package, sent to the building housing De Niro’s Tribeca Grill and the office of his film production company, is similar to a package that included a return address that belonged to Wasserman Schultz.

The police department had tweeted earlier Thursday that "we are responding to reports of a suspicious package in the vicinity of Greenwich and Franklin streets in Tribeca, Manhattan. Please avoid the area and expect a police presence and heavy traffic. More information to follow."

On Thursday, without directly referencing the explosive devices, Trump again blamed the media for the “anger” in society.

“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,” the president said in a morning tweet. “It has gotten so bad and hateful that it is beyond description. Mainstream Media must clean up its act, FAST!”

Thursday's package in New York City was the latest in a seemingly coordinated coast-to-coast attack on prominent liberals.

Those sent packages included: former President Obama in Washington, former Secretary of State and First Lady Hillary Clinton in suburban New York, Wasserman Schultz in South Florida, the Westchester County, New York, residence of philanthropist and Democratic donor George Soros, along with CNN and two addressed to Rep. Maxine Waters, D-Calif.

Authorities said Wednesday's pipe bombs were packed with shards of glass and were intercepted.

One of the explosives was sent to CNN, which prompted the evacuation of the Time Warner Center in Manhattan, where CNN has offices.

Contributing: Associated Press; The (Wilmington, Del.) News-Journal