The FBI made an arrest on Thursday in its nearly 5-year-old investigation into pipe bombs placed outside the headquarters of the Republican and Democratic national parties in Washington on the eve of the Jan. 6, 2021, riot at the U.S. Capitol.

The arrest marks the first time investigators have settled on a suspect in an act that had long vexed law enforcement, spawned a multitude of conspiracy theories and remained an enduring mystery in the shadow of the dark chapter of American history that is the violent Capitol siege.

The suspect in custody has been identified as Brian Cole, according to three people familiar with the matter. Two of the people said he lived in Woodbridge, Virginia, a suburb of Washington, D.C.

No other details were immediately available, including the charges C

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