WASHINGTON (AP) — Facebook made a mistake in not removing a militia group's page earlier this week that called for armed civilians to enter Kenosha, Wisconsin, amid violent protests after police shot Jacob Blake, CEO Mark Zuckerberg says.

The page for the "Kenosha Guard" violated Facebook's policies and had been flagged by "a bunch of people," Zuckerberg said in a video posted Friday on Facebook. The social media giant has in recent weeks adopted new guidelines removing or restricting posts from groups that pose a threat to public safety.

Facebook took down the page Wednesday, after an armed c...