LORTON, Va. (AP) — Officials are investigating an apparent pipe bomb that destroyed a mailbox at the Virginia home of the Treasury Department’s inspector general, but a department official says there’s no reason to suspect it was linked to the inspector general’s work.

No one was injured when the device exploded at the Fairfax County home of Eric M. Thorson between midnight and 12:30 a.m. Monday. Richard Delmar, counsel to the inspector general, says officials have no reason to suspect the bombing was linked to Thorson’s work at the department.

An investigation is ongoing. Thorson joined the department as inspector general in 2008.

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