(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.

This is a developing story and will be updated.

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