WASHINGTON (AP) — The FBI informed Congress Friday it is investigating whether new emails that have emerged in its probe of Hillary Clinton's private server may contain classified information. The FBI said in July its investigation was finished.

The disclosure raises the possibility of the FBI reopening the criminal investigation involving the Democratic presidential nominee just days before the election, although it is not clear if that will happen.

Clinton's campaign didn't immediately respond to request for comment.

In a letter sent to congressional leaders, FBI Director James Comey says that new emails have come to light recently that have prompted investigators to take another look at the sensitive government information that flowed through the private email sever Clinton used while serving as secretary of state.