AKIPRESS.COM - Suspected explosive devices have been sent to top Democrats including Barack Obama and Hillary Clinton, as well as CNN, US officials have said.

It comes two days after a pipe bomb was found at the home of liberal philanthropist and financier George Soros in the suburbs of New York City, BBC reports.

CNN's New York office was evacuated on Wednesday morning after a suspected bomb was sent to their mailroom.

President Donald Trump said that these threats "have no place in America".

Speaking at the White House, Mr Trump said that he has been briefed by the FBI and "a major federal investigation is now under way".

"The safety of the American people is my highest and absolute priority," he said.

"In these times we just have to unify. We need to come together and send one very clear unmistakable message that threats or acts of political violence of any kind have no place in America."

When asked about the pattern of these attempted attacks, during a news conference, New York Police Commissioner O'Neill said law enforcement is proactively contacting people to ensure other mail rooms "follow proper protocol".

The FBI in New York said they were aware of the suspected packages, and that their Joint Terrorism Task force is aiding in the investigation.

New York Mayor Bill de Blasio decried the attempted attacks as "an act of terror attempting to undermine our free press and leaders of this country".

"To all public officials, to all partisan affiliations - don't encourage violence, don't encourage hatred, don't encourage attacks on media you can disagree but you have to show respect."