Suspicious explosives were sent to the best Democrats, including Barack Obama and Hillary Clinton, and to CNN, US officials said.
It comes two days after a bomb was discovered in the house of liberal philanthropist and financier George Soros in a suburb of New York City.
The CNN office in New York was evacuated Wednesday morning after a suspicious bomb had been sent to its post office.
President Donald Trump said that these threats “do not take place in the United States.”
Mr. Trump told the White House that the FBI was teaching him and “a large federal investigation is ongoing.”
“The security of the American people is my highest and absolute priority,” he said.
“Right now we just have to unite, we must meet and send a clear and unequivocal message that threats or acts of political violence of any kind in the United States do not take place.”
When New York Police Commissioner O’Neill was asked about the pattern of these attempted attacks, he said that law enforcement agencies proactively engage with people to ensure that other post offices “Follow the correct protocol.”
The FBI in New York said they were aware of the alleged packages and that their Joint Counter-Terrorism Task Force helped with the investigation.
The mayor of New York, Bill de Blasio, criticized the attacks as “an act of terror that attempts to undermine our free press and the leaders of the country.”
“To all officers, to all party affiliations: do not foment violence, encourage hatred, encourage attacks on the media you can not accept, but you must show respect.”
Who received these packages?
The packages were addressed to former President Obama, former Secretary of State Clinton and former CIA director John Brennan.
Other suspicious agencies are investigating other suspicious packages addressed to Democrat Maxine Waters and former Attorney General Eric Holder.