A number of pipe bombs mailed to prominent Democratic figures this week had passed through a processing center in Southern Florida, a report said Thursday.

Authorities believe that several of the packages have been processed at the Opa-Locka facility, which is located about 12 miles north of Miami, according to CNN.

The massive Opa-Locka postage center handles all of the mail coming from Southern Florida, the network said.

The information came to light as investigators were attempting to determine who had sent the crude mail bombs to Democratic politicians such as Hillary Clinton, President Obama and Joe Biden.

Also receiving the packages were critics of President Trump such as Robert DeNiro and George Soros.

No one had been injured by the devices, and officials were still trying to determine whether they were operable.