WASHINGTON (AP) — In the face of criticism that Facebook is not doing enough to combat extremist messaging, the company likes to say that its automated systems remove the vast majority of prohibited content glorifying the Islamic State group and al-Qaida before it's reported.

But a whistleblower's complaint shows that Facebook itself has inadvertently provided the two extremist groups with a networking and recruitment tool by producing dozens of pages in their names.

The social networking company appears to have made little progress on the issue in the four months since The Associated Press de...