UPDATE: Authorities have made an arrest in connection with the mail bombs in Florida.

The number of suspicious packages sent to prominent Democrats and Trump critics now stands at 12 after new discoveries Friday morning in Florida and New York City. 

At least one package discovered in midtown Manhattan was addressed to James Clapper, a former top intelligence official who has been a vocal critic of President Trump. 

Another parcel turned up in Florida, addressed to Sen. Cory Booker (D-N.J.)

Federal investigators had zeroed in on Florida as a "region of interest" in the manhunt, two sources told Fox News on Thursday.

Previous suspicious packages were addressed to former President Barack Obama, former Secretary of State Hillary Clinton, liberal billionaire George Soros, former Attorney General Eric Holder, former CIA Director John Brennan and California Democratic Rep. Maxine Waters.

Several of the packages contained what officials called a "potential explosive device," though none were found to be operational. Brennan's package was sent to CNN headquarters in New York, forcing the newsroom to evacuate on Wednesday morning. 

A few more packages turned up on Thursday, addressed to former VP Joe Biden and to actor Robert De Niro's Manhattan restaurant. 

Watch the "America's Newsroom report above and read more on this story, here.

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