Former US President Barack Obama and former US First Lady Michelle Obama attend the unveiling of their portraits at the Smithsonian’s National Portrait Gallery in Washington, DC, February 12, 2018. (SAUL LOEB/AFP/Getty Images)

By William K. Rashbaum

The Secret Service intercepted potential explosive devices mailed to the homes of former President Obama in Washington, D.C., and Hillary Clinton in a New York City suburb.

The official said the devices were similar to one found at the home of billionaire philanthropist George Soros on Monday.

It was not immediately clear where the devices were found.

Like the Clintons' home, Soros’ home is in a suburb north of New York City. That device was constructed from a length of pipe about six inches long filled with explosive powder, and it was “proactively detonated” by bomb squad technicians, according to an official who was briefed on the investigation.

The motive of the would-be Soros bomber or bombers remained unclear, one of the officials said, adding that there had not yet been any claim of responsibility.

Soros, who made his fortune in finance and is now a full-time philanthropist and political activist, is often a subject of the ire of right-wing groups. In recent days, some have falsely speculated that he funded a caravan of migrants moving north in Mexico.