Multiple officials briefed on the investigation say they are looking into whether suspicious packages mailed to several Democratic leaders and others were mailed from Florida, according to nbcnewyork.com.

Authorities believe several packages went through a mail facility in Opa-locka, Florida, according to CNN.

Law enforcement sources tell WPTV there is a strong indication that there could be a South Florida connection.

The latest packages, addressed to former Vice President Joe Biden, are similar to eight others found earlier this week.

NBC News: At noon multiple senior law enforcement officials say that at this point in the investigation there's no specific suspect they are looking for. Investigators are looking into whether some of the packages were mailed from Florida. Latest reporting from @jonathan4ny — Tom Winter (@Tom_Winter) October 25, 2018

Those packages were addressed to former President Barack Obama, Hillary Clinton, and others, as well as actor Robert DeNiro, a vocal critic of President Trump.

The president has denounced the apparent bombing attempts, saying "Such conduct must be fiercely opposed and thoroughly prosecuted," but at a rally Thursday night and again Friday morning he blamed the media, tweeting that "fake news is fueling anger around the country."

Most of the packages were intercepted at mail facilities and got nowhere near their intended targets.

Information from NBC NEWS

JUST IN: Investigators believe all suspicious packages sent to prominent Democrats went through U.S. Postal Service; investigation focusing on Florida - law enforcement source http://t.co/Mw16Q2VMcF — Reuters Top News (@Reuters) October 25, 2018