The investigation into suspicious packages sent to Democratic figures, prominent party supporters and CNN this week is focusing on Florida, law enforcement sources told The Post on Thursday.

At least some of the 10 parcels, containing apparent pipe bombs, appear to have been sent from the Sunshine State, according to the Wall Street Journal.

“It appears most of them if not all of them have gone through the mail,” an official told the paper.

The parcels have been sent to former President Barack Obama, former Vice President Joe Biden, Hillary Clinton, Rep. Maxine Waters, former Attorney General Eric Holder, Democratic donor George Soros, actor Robert De Niro — and former CIA Director John Brennan, via CNN’s Manhattan office.

All the parcels listed Rep. Debbie Wasserman Schultz’s Florida office as the return address, according to the FBI — and the package intended for Holder wound up being rerouted there, where it was found Wednesday.

CNN reported that the package sent to its headquarters came via courier, and some reports said the parcel found in Soros’ mailbox upstate was hand-delivered. But the package found at De Niro’s Tribeca office came through the mail, sources said.