UPDATE 2:20 p.m., April 17: The staff, but only the staff, has been allowed to go back inside the courthouse.
Amidst speculations of an arrest of a suspect in the Boston Marathon bombing, the Federal Courthouse in south Boston has been evacuated due to a bomb threat.

Federal Marshals are forcing people to move back and asking people to relocate to another area more than 100 yards from the building.

Reporters were gathered at the courthouse in anticipation of suspect being in custody who would be brought before the court.

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