The investigation into 10 pipe bombs sent to high-profile Democrats and critics of U.S. President Donald Trump is focusing on leads in Florida, a federal law enforcement source said on Thursday while another source said investigators believe the devices' design came from the internet.
All the suspicious packages were believed to have gone through the U.S. postal system at some point, the source said. Many of the packages had the return address of the Florida office of U.S. Rep. Debbie Wasserman Schultz, who formerly chaired the Democratic National Committee, according to the Federal Bureau of Investigation.
The instructions for such explosive devices are widely available on websites and in propaganda distributed by militant groups such as Islamic State and al-Qaida, said the second law enforcement official and a former federal government bomb expert.
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