Person in custody in connection with mail bomb probe

CNN/Handout | Reuters

A package containing a “live explosive device” according to police, received at the Time Warner Center which houses the CNN New York bureau, in New York City, U.S. is shown in this handout picture provided October 24, 2018. 

A man in his 50s was arrested in Florida on Friday morning in connection with the ongoing investigation of 12 suspected mail bombs sent to former president Barack Obama, Hillary Clinton, and other leading critics of President Donald Trump.

The man, whose name was not made public, is expected to face federal criminal charges, according to NBC News.

NBC reported that the man may have previously lived in New York state, and possibly in New York City.

MSNBC was showing images of signicant police activiy around an auto parts store in Plantation, Florida.

The Justice Department has scheduled a news conference in the case at 2:30 p.m., Eastern time.

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The suspected pipe bombs began being discovered Monday, when an explosive device was found delivered to the Westchester County home of billionaire philanthropist George Soros.

This is a developing news story. Check back for updates.