This still from video from the FBI shows the person who placed two viable pipe bombs near the Republican and Democratic National Committee headquarters in Washington, DC on January 5, 2021. Federal Bureau of Investigation

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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