An investigation into the autopen controversy involving former President Joe Biden is gaining momentum in Delaware and Washington, D.C., Fox News has learned.

A source familiar with the situation told Fox News on Wednesday morning, “It looks like the investigation has heated up in recent weeks and it appears there’s a focus in Delaware as well as Washington, DC.”

On Tuesday, Attorney General Pam Bondi wrote in a post on X that her “team is reviewing the Biden administration’s reported use of autopen for pardons.”

This is a developing news story; check back for updates.