(CNN) — The FBI arrested a man on Thursday who investigators believe planted pipe bombs near the Republican and Democratic National Committee headquarters the night before the 2021 US Capitol riot , according to two law enforcement sources.

The arrest follows an almost five-year investigation to uncover the identity of the bomber who has only been seen in grainy surveillance video shrouded in a hoodie, gloves and a face mask.

Video clips previously released by the FBI showed an individual placing a bomb outside the DNC headquarters and another in an alley behind the RNC building, both just a few blocks away from the US Capitol. Then-Vice President-elect Kamala Harris came within 20 feet of the bomb at the DNC the next morning, and its discovery diverted police away from the viol

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