SPOKANE -

Authorities are being tight-lipped regarding the discovery an improvised explosive device (IED) that was found outside the Federal Courthouse in downtown Spokane last month.

Assistant US Attorney Tom Rice confirmed only that a device was found outside the Tom Foley Federal Courthouse on March 28th. Rice would not confirm any other details about the device or its capabilities.

As for why the public wasn?t made aware of the device Rice said authorities did not notify the public because an investigation is ongoing. The discovery of the IED was first reported Wednesday morning by The Spokesman-Review.

Rice said that no arrests have been made in the case.

Both the FBI and the US Marshal?s Office also declined to comment on the matter.

This wasn't the first time an IED has been brought to the steps of a local government building. Back in 2007 a woman showed up to the Spokane Courthouse Annex with a pipe bomb in her backpack, prompting an evacuation of the building.

In April of 1996 a pipe bomb packed with nails was detonated on the doorstep of Spokane City Hall. That pipe bomb was later confirmed to be the work of Chevie Kehoe.