Miami-Dade County Police and federal agents appear to have evacuated a USPS mail sorting and distribution center in Opa Locka Thursday night. 
 
 Police officers and K-9 units were seen at the property as trucks continued to enter the facility business as usual. 
 
 At around 10:15 p.m. Thursday, a driver told members of the media that everyone was being asked to leave. Shortly after, a group of people who appeared to be employees were escorted out of the facility. 
 
 Officers were seen entering the building with what appeared to be SWAT gear. 
 
 A CNN report stated two law enforcement officials close to the investigation said the suspicious packages sent to prominent Democrats went through the South Florida mailing center. 
 
 The FBI has not confirmed the Opa Locka facility is part of the investigation but said that multiple agencies coast to coast is involved in actively tracking more potential suspicious packages. ||||| A sprawling U.S. mail sorting facility near the Opa-locka airport — the size of five football fields — took center stage Thursday when federal investigators discovered that at least one of the bomb-filled packages targeting an array of Democratic figures passed through the location. 
 
 Where that package originated, however, remained unclear because the Opa-locka postal facility sorts hundreds of thousands of packages daily that come in and out of South Florida. The bigger mystery was who plotted the series of mailings and why. 
 
 The package in question is likely the one that ended up Wednesday at the Sunrise congressional office of U.S. Rep. Debbie Wasserman Schultz, according to a federal law enforcement official familiar with the probe. 
 
 That package was originally sent to the office of former U.S. Attorney General Eric Holder in the Washington, D.C., area, but it did not get delivered and was sent back to the return address, which was listed as the congresswoman’s office in Sunrise. Before it got there, it was rerouted through the giant Opa-locka mail sorting facility, the official said. 
 
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 That development capped a frenetic day for the FBI-led counter-terrorism team leading a nationwide search. The packages containing crudely fashioned devices that looked like pipe bombs have now been recovered in South Florida, New York , the Washington, D.C., area, California and Delaware. They were sent to at least 10 prominent Democratic politicians and other vocal critics of President Donald Trump from presidential nominee Hillary Clinton to actor Robert De Niro. 
 
 The U.S Postal Service directed investigators to Opa-locka after reviews of mail scans showed some of the devices had found their way through the massive sorting facility. 
 
 On Friday, the FBI confirmed that an 11th package, similar in appearance to the others, was “recovered in Florida” and addressed to Sen. Cory Booker of New Jersey. But in the brief news update, the agency did not say whether the manila envelope, which also listed Wasserman Schultz on the return address, was processed at the Opa-locka mail facility. 
 
 It was also reported that a 12th package, addressed to James R. Clapper Jr., the former director of national intelligence, was intercepted at a New York City mail facility. The package was addressed to Clapper at CNN’s news offices in New York. 
 
 The bombing devices — clearly aiming to shake up the political landscape just two weeks before the midterm elections — were so poorly constructed that at least one source involved in the investigation told The Miami Herald that they could not detonate. Whether they were intentionally designed that way was not known. 
 
 After news media reported on the Opa-locka mail facility’s connection to the bomb threats late Thursday, the Miami-Dade County Police Department dispatched a bomb squad and K-9 unit to do a sweep of the place. No explosive devices were found. 
 
 U.S. postal inspectors in Florida and the other states are combing databases to see if there are any other suspicious packages en route to more potential political targets. 
 
 The South Florida connection was just the latest development in a widening probe into the threatening mailings.
– A huge postal facility in south Florida was evacuated Thursday night as the search for the person who sent pipe bombs to leading Democrats and other critics of President Trump continued. Miami-Dade County police officers, K-9 units, and federal agents could be seen entering the Opa-locka mail sorting and distribution facility, WPTV reports. The US Postal Service directed law enforcement to the facility after discovering some of the packages passed through the facility, but since Opa-locka handles hundreds of thousands of packages from Florida and further afield daily, the source of the packages remains unclear, reports the Miami Herald. Homeland Security Kirstjen Nielsen told Fox News that the packages "originated, some of them, from Florida." She added: "I am confident that this person or people will be brought to justice." The number of packages intercepted rose to at least 10 Thursday when pipe bombs sent to Robert De Niro and Joe Biden were found, and authorities have warned that there could be more out there. None of the packages exploded, and although they contained batteries and timers, authorities say they would not have blown up when opened. Law enforcement officials tell the AP that it's unclear whether they were poorly designed or were never intended to explode. (Conspiracy theorists claim the devices are a "false flag" attack to discredit right-wingers ahead of the midterm elections.)