FBI agents have arrested a man suspected in the bombing attempt during the Martin Luther King Jr. Day parade in Spokane, Washington.
Law enforcement officials are searching a home near Colville, north of Spokane, according to local television reports.
Evidence found inside the bomb were reportedly tied to that area. The FBI said the backpack contained two T-shirts, one from the 2010 Stevens County Relay for Life, an American Cancer Society fundraiser, and the other reading, “Treasure Island Spring 2009.”
Most investigators believe race and hate were likely motives for the attempted bombing, The Seattle Times reported.
The “potentially deadly” explosive device that could have caused severe casualties was found along the intended parade route a half an hour before the event was to begin.
The annual march was rerouted after city workers noticed a black Swiss Army backpack apparently abandoned on a bench.
About 1,500 people marched along the new route without incident while the Spokane Explosives Disposal Unit neutralized the device.
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